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36400 Porriño, Pontevedra

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25 June, 2024 by Grupimar 0 Comments

Thermal Properties of Granite: Energy Efficiency and Indoor Comfort

Granite is known for its durability, beauty, and strength, but one of its most outstanding and least discussed characteristics is its thermal properties. These properties not only contribute to the energy efficiency of buildings but also offer superior comfort in indoor spaces. In this article, we will explore in detail the thermal properties of granite and how they can be leveraged to improve indoor comfort.

Thermal Properties of Granite

The thermal properties of granite are crucial for its performance as a building material, highlighted by several aspects that make it ideal for indoor use.
Thermal Conductivity: Granite has relatively high thermal conductivity, allowing it to transfer heat efficiently. This means it can act as a natural thermal regulator, distributing heat evenly. In warm climates, this helps dissipate heat, while in cold climates, it facilitates heat retention in indoor spaces.

Thermal Capacity: Granite’s thermal capacity, or its ability to store heat, is considerably high. During the day, granite can absorb and store heat from the sun, then release it slowly at night. This process helps maintain a more stable indoor temperature, reducing the need for additional heating systems.

Thermal Inertia: Granite’s thermal inertia is one of its most valuable properties. This material takes time to heat up and cool down, contributing to less fluctuation in internal temperature. This translates to a reduction in thermal stress for the building’s occupants, providing a more comfortable indoor environment.

Resistance to Thermal Changes: Granite is highly resistant to sudden temperature changes, making it ideal for environments where temperature variations are frequent. Its thermal stability ensures it does not deform or crack easily, maintaining its structural and aesthetic integrity over time.

Thermal Mass Effect: Granite acts as an effective thermal mass, absorbing heat during warm periods and releasing it during cold periods. This effect significantly contributes to regulating internal temperature, improving energy efficiency and the thermal comfort of the building.

Advantages of Granite for Indoor Comfort

The use of granite indoors offers several advantages in terms of thermal comfort:

Temperature Stability: Thanks to its high thermal capacity, granite helps maintain a constant temperature in the home, avoiding heat and cold peaks. This is particularly useful in climates with large temperature variations.

Energy Efficiency: Granite’s ability to store and release heat reduces the need for heating and cooling systems, leading to lower energy consumption and, consequently, lower energy bills.

Thermal Comfort: By minimizing temperature fluctuations, granite contributes to creating a more comfortable indoor environment. The more stable temperature reduces thermal stress on the building’s occupants, providing a more pleasant atmosphere.

Durability and Maintenance: In addition to its thermal properties, granite is extremely durable and requires little maintenance, making it a long-term investment for any indoor space.

Applications of Granite in Interior Design

The use of granite in interior design not only adds a touch of elegance and durability but also significantly improves the thermal comfort of living spaces. Below are some of the most effective applications of granite indoors:

Granite Flooring: Granite flooring is a popular choice due to its ability to regulate indoor temperature. In warm climates, granite floors can help keep spaces cool by absorbing and dissipating heat. In cold climates, their capacity to store heat during the day and release it slowly at night contributes to a warmer and more comfortable environment.

Countertops and Work Surfaces: Granite countertops are not only durable and aesthetically attractive but also play a role in the thermal regulation of interiors. Granite’s thermal conductivity helps dissipate heat generated by appliances, keeping work surfaces at a more constant and comfortable temperature for daily use.

Wall Claddings: Using granite in wall claddings can significantly improve a building’s thermal efficiency. Granite-clad walls act as a thermal mass, absorbing and storing heat during the day and releasing it slowly at night. This not only improves thermal comfort but can also reduce energy costs associated with heating and cooling.

Fireplaces and Stoves: Granite is an ideal material for cladding fireplaces and stoves due to its high thermal resistance. Its ability to withstand high temperatures without deteriorating makes it perfect for these applications, and its ability to store and slowly release heat helps maintain a pleasant temperature in the surrounding areas.

Bathrooms and Spas: In bathrooms and spas, granite can be used to clad floors, walls, and work surfaces. Its resistance to moisture and ability to maintain a stable temperature make it ideal for these environments. Additionally, its elegant appearance and natural feel add a touch of luxury and comfort to these spaces.

Additional Benefits of Granite Indoors

Wear Resistance: Granite is extremely resistant to scratches and wear, making it ideal for high-traffic areas such as kitchens and hallways.

Easy Maintenance: Its non-porous surface makes it stain-resistant and easy to clean, reducing the need for constant maintenance.

Versatile Aesthetics: Available in a wide variety of colors and textures, granite can complement any interior design style, from traditional to contemporary.

The thermal properties of granite offer multiple benefits for indoor comfort. From temperature stability to energy efficiency and thermal comfort, granite presents itself as an ideal option for those seeking to improve the quality of their indoor spaces. At Grupo Marcelino, we pride ourselves on offering a wide range of high-quality granites that not only meet aesthetic and durability standards but also provide significant thermal benefits for any construction project. If you want to know more about our granite options and how they can enhance your space, do not hesitate to contact us.

By investing in granite, you are not only choosing a material that will add beauty and strength to your spaces but also contributing to a more comfortable and energy-efficient environment. Feel free to explore the many possibilities that granite offers to transform your interiors and enjoy its countless thermal advantages.

Rosa Porriño Granite: Origin and Applications in Modern Decoration

Granite, due to its beauty and durability, has been a cornerstone in construction and decoration for millennia. Particularly, Rosa Porriño granite, with its distinctive pink coloration and fine grain, has captured the attention of architects and designers worldwide.

History of Rosa Porriño Granite

Geological Origins of Granite

Rosa Porriño Granite is a geological formation that originates from magma slowly cooling beneath the earth’s surface, allowing mineral crystallization that gives it its characteristic pink color.

This natural process ensures that each granite block is unique, with variations that add beauty and character.

Early Extractions and Historical Use

Extraction of Rosa Porriño granite began in Galicia, Spain, where this natural resource is abundant. Since its early extractions, this granite has been used in numerous historical buildings and monuments throughout Europe.

Granite Quarries in Galicia

The original Rosa Porriño Granite quarry in Galicia has been exploited for over a century. Marcelino Martínez, founder of our company, was a pioneer in marketing this granite from his quarry in Porriño.

Expanding its use beyond local borders to international markets helped establish the reputation of this material in the global construction industry.

Characteristics of Rosa Porriño Granite


Visual and Textural Description

Rosa Porriño granite is distinguished by its elegant and unique coloration, predominantly pink with black spots. Its appearance is uniformly crystalline, offering a subtle shine that enhances its natural texture.

Physical and Chemical Properties

This type of granite is appreciated not only for its aesthetics but also for its high resistance to abrasion, low porosity, and durability against adverse weather conditions. These properties make it ideal for use in both exterior and interior settings, ensuring a long lifespan with minimal maintenance.

Finishes of Rosa Porriño Granite

Rosa Porriño granite offers a variety of finishes, adapting to different architectural and decorative styles. Each finish has specific characteristics that enhance its aesthetic and functional qualities, making it even more versatile for various applications both indoors and outdoors.

Polished Finish

The polished finish is the most popular for Rosa Porriño granite, especially in countertops, interior floors, and cladding. This process involves polishing the granite until it achieves a mirror-like shine, highlighting the richness of its pink tones and the depth of its granular texture.

Honed Finish

The honed finish provides a matte surface that does not reflect light, ideal for those who prefer a more subtle and natural appearance. This finish is perfect for exteriors such as pavements and facades, as it offers excellent slip resistance.

Flamed Finish

The flamed finish is especially suitable for exteriors due to its rough texture that enhances traction and slip resistance. This finish is achieved by applying a high-temperature flame to the granite surface, causing the outer layer of the material to expand and then flake off, leaving a rougher texture and a slightly darkened color.

Satin Finish

The satin finish provides a smooth texture with a subtle shine, less intense than polishing. This finish is ideal for those seeking a surface that combines elegance and discretion. It is stain-resistant and easy to maintain, perfect for kitchens, bathrooms, and other interior spaces where a refined touch is desired without the high gloss of the polished finish.

Shot-Blasted Finish

The shot-blasted finish is achieved by bombarding the surface of the granite with small steel spheres at high speed. This results in a rougher and uniformly granulated texture, highly appreciated for its rustic appearance and high slip resistance. This finish is exceptionally suitable for exteriors, such as high-traffic areas, pavements, and commercial environments where durability and additional slip resistance are required.

Each of these finishes can be used depending on the specific project and client needs, ensuring that Rosa Porriño granite not only meets functional requirements but also contributes aesthetically to the designed space. The choice of the right finish will allow this granite to seamlessly integrate into any context, from the most modern to the most classic.

Applications in Modern Decoration

Indoor Use: Floors, Countertops, and Cladding

Rosa Porriño granite is particularly valued in interior decoration for its resistance and attractive aesthetics. It is commonly used in high-traffic floors, kitchen and bathroom countertops, as well as wall cladding. Its durability and easy maintenance make it an ideal choice for spaces that require both functionality and beauty.

Outdoor Use: Facades, Plazas, and Landscaping

In outdoor settings, Rosa Porriño granite stands out in building facades, public squares, and landscaping projects. Its ability to withstand weathering and low water absorption make it suitable for varied climates, from the coldest to the warmest.

Emerging Trends in Architecture and Design

One emerging trend is the use of granite in large formats, allowing for continuous surfaces with minimal joints, offering a cleaner and more modern appearance. Additionally, the interest in incorporating local materials into construction projects is driving the popularity of indigenous varieties like Rosa Porriño granite, thus reducing the carbon footprint associated with material transportation.

Examples of Prominent Projects with Rosa Porriño Granite

Marcelino Group has supplied Rosa Porriño granite for numerous iconic projects internationally.


Beursplein Square in Amsterdam: Rosa Porriño granite was used for the pavement of Beursplein Square in Amsterdam.

Kartal Dr. Lütfi Kırdar Hospital in Turkey: The hospital’s floor is composed of a mixture of various polished granites, including Rosa Porriño granite.

The Guggenheim Museum in Bilbao: Rosa Porriño granite was also used in the paving of the Guggenheim Museum square.

Santoña Promenade in Santander: Finally, in the extensive promenade of Santoña, you’ll find a combination of Rosa Porriño granite with Gris Cadalso granite.

23 April, 2024 by Grupimar 0 Comments

Granite or Marble: Which is the Best Option for Your Home?

In the universe of construction and interior design, choosing the right materials is crucial for the success of any project. Granite and marble are two of the most sought-after and used materials due to their aesthetics and durability. However, even though both are symbols of elegance and resilience, they have distinct characteristics that may make one more suitable than the other depending on the needs and usage conditions. In this article, we will explore these differences in depth, and discuss which could be the best choice for your home.


Granite Characteristics

Durability and Resistance

Granite is one of the hardest materials available for residential and commercial use, making it ideal for countertops, flooring, and exterior cladding. Its mineral composition gives it exceptional resistance to scratches, impacts, and high temperatures.

Granite Maintenance

One of the most significant advantages of granite is its ease of maintenance. Thanks to its low porosity, surface stains can be easily cleaned with a damp cloth and mild detergent. Granite can maintain its appearance with minimal cleaning effort and without the need for frequent treatments.

Variety of Finishes and Colors


Granite is available in a wide range of colors and patterns, each with a unique beauty that can adapt to any interior or exterior design style. Finishes can vary from polished, which offer a reflective shine, to textured like flamed or honed, providing a more organic and subtle appearance.


Marble Characteristics


Exceptional Aesthetics

Marble is known for its natural beauty, characterized by subtle veins and a variety of shades, from pure whites to deep blacks, and including greens and reds. This natural stone is synonymous with luxury and exclusivity, making it perfect for enhancing any interior space.

Texture and Touch

The surface of marble is particularly valued for its smoothness to the touch, making it a preferred material for interior finishes such as bathroom countertops, wall claddings, and living room floors, where the smooth texture adds an element of refinement and sensory comfort.

Versatility in Applications

Despite its perception as a delicate material, marble is used in a wide range of applications. Its ability to be polished to a high gloss makes it ideal for areas that seek to reflect light and spaciousness, while its more matte finishes are chosen for projects that require a more sober and resilient appearance.


Granite or Marble, What are the Differences?


Porosity, Resistance to Stains and Scratches

Granite stands out for its inherent robustness. Its dense crystalline structure makes it less porous than marble, resulting in a surface that absorbs much less liquid. This translates into greater resistance against stains and ease of cleaning. While marble may require periodic sealers to protect its surface, granite maintains its integrity with less effort, making it ideal for kitchens, bathrooms, and high-traffic areas.

Analysis of Longevity and Resistance

Granite is not only durable against daily wear and tear but also highly resistant to temperature changes, making it suitable for a variety of environments, both indoors and outdoors. Its resistance to degradation under direct sunlight exposure and erosion from acid rain makes it the preferred candidate for long-term projects that require low maintenance and high durability.

Consistency of Color and Patterns

Marble may show more marked variations in color and veining from one slab to another, while granite tends to offer greater consistency in its patterns and hues. This allows for better planning and uniformity in large-scale projects, ensuring that all areas maintain aesthetic coherence without unexpected surprises in color or texture of the material.

Resistance to Chemical Compounds and Abrasives

In environments where chemicals are handled, such as kitchens or laboratories, granite offers superior resistance to most corrosive compounds compared to marble, which is more susceptible to damage by acids like lemon or vinegar. This makes granite a safe choice for those looking for durability without compromising functionality.

Cost-effectiveness in the Long Run


Although the initial investment in granite may be comparatively higher than in marble, its durability and low maintenance make granite a more cost-effective option in the long run. This feature makes it especially attractive for construction and renovation projects where long-term budget is a critical consideration.

After reviewing the characteristics, advantages, and applications of granite compared to marble, it is evident that granite is not only a great choice for aesthetic value but also a smart choice for its durability, resistance, and low maintenance. At Marcelino Group, we understand the importance of choosing the right material, granite or marble, that not only meets your expectations of beauty but also withstands the test of time and the demands of daily use.

Granite offers a robust and practical solution for almost any surface in the home, from kitchen countertops to exterior claddings, providing an impressive finish that is both functional and durable. Its ability to withstand adverse conditions and its easy maintenance make it the perfect companion for those who value both aesthetics and functionality.

We invite you to visit our website to discover the wide variety of granites we offer, each with a guarantee of quality and sustainability that characterizes us. At Marcelino Group, we are ready to help you select the best granite for your project, ensuring that your investment is synonymous with quality and lasting beauty. If you have a project in mind, do not hesitate to contact us for personalized advice and to take advantage of our exclusive experience and resources.

2 April, 2024 by Grupimar 0 Comments

Antibacterial properties of granite: a hygienic option for worktops

In a world where hygiene and cleanliness have taken on unprecedented importance, choosing the right material for kitchen and bathroom worktops takes on unprecedented relevance. Granite, known for its durability and natural beauty, is emerging today not only for these aesthetic and functional qualities, but also for its outstanding antibacterial properties. At Marcelino Group, our experience in countless interior design projects underlines the versatility and hygienic character of granite, demonstrating its ability to enrich every space with its elegance and functionality. Therefore, in this post we will go into more detail on how granite is the ideal material to guarantee hygienic surfaces.

What is an anti-bacterial material?


In the context of increasing hygiene and health standards, it is essential to understand what makes a material antibacterial. An antibacterial material is a material which, either by its natural composition or by specific treatment, is capable of inhibiting the growth or reproduction of bacteria. This capability makes it an ally in the prevention of contamination and the spread of disease, especially on surfaces that come into frequent contact with food, hands and everyday objects.

With this in mind, while there are a number of materials that offer antibacterial properties, granite stands out among them.

Propiedades antibacterianas del granito


Although not often talked about, granite has natural antibacterial properties. Its low porosity surface effectively prevents the build-up of bacteria and other microorganisms, making it a perfect choice for areas where cleanliness is essential.

In addition to its inherent antibacterial properties, granite’s other properties such as durability, stain, scratch and heat resistance make it an attractive choice for bathrooms and countertops. Granite’s ability to resist bacterial growth is further enhanced by its ease of cleaning. Unlike other materials that may require aggressive cleaning products to keep them hygienic, granite can be kept clean with a simple solution of water and mild soap, thus avoiding the need for chemicals that could be harmful to health.

With over six decades of experience in quarrying and processing premium quality granite from our quarries, we at Marcelino Group are committed to providing a material that is not only aesthetically superior and durable, but also promotes safer and healthier environments.

Comparison with other materials


When granite is compared to materials such as wood or stainless steel, granite stands out not only for its aesthetic appeal but also for its superiority in terms of hygiene. Unlike wood, which can retain bacteria in its pores and fissures, or stainless steel, which despite its name can scratch and harbour bacteria in those scratches, granite retains its integrity over time.

Granite’s ability to withstand daily wear and tear without losing its natural beauty or hygiene is unparalleled. Materials such as laminate can deteriorate or peel over time, creating crevices where bacteria can proliferate. On the other hand, granite maintains a smooth, continuous surface thatcan be effectively cleaned and disinfected.

Granite applications

Granite in the kitchen: The importance of worktop hygiene


Far from being simple work surfaces, kitchen worktops become the epicentre of the home, where everyday life takes shape. Keeping these surfaces hygienic is essential to prevent the transmission of bacteria and to ensure the safety of the food we share with family and loved ones.

Such a surface must face daily challenges such as contact with hot elements, oils and frequent use of cutting utensils, which demands exceptional resistance. In this area, granite stands out for its heat tolerance, its hardness and its ability to repel most stains, marking a notable difference with materials such as marble or certain woods, which tend to be more vulnerable to damage and stains.

Granite in the bathroom: Cleanliness raised to the highest expression


The bathroom, a personal haven for grooming and relaxation, demands surfaces that not only reflect beauty, but also support impeccable hygiene. This is where granite, with its natural antibacterial properties, distinguishes itself as the ideal choice for worktops, sinks and floors.

Its robustness against humidity and the ease with which it can be kept clean make it the perfect candidate for environments that seek to combine functionality with refined design.

Care and maintenance of granite


To preserve the antibacterial properties and beauty of granite, it is important to follow some maintenance practices. For daily cleaning, we recommend the use of warm water and neutral soap, a mild solution that is effective without being harmful to the granite surface.

This is particularly important in kitchens and bathrooms, where frequent cleaning is essential to maintain a healthy environment. Avoiding the use of acidic or abrasive products is key, as these can damage the sealer applied to the granite and thus its stain resistance and surface integrity, preventing bacteria and micro-organisms from finding a place to proliferate.

By following these care and maintenance recommendations, granite worktops in the kitchen and bathroom will not only retain their beauty and durability, but will also continue to provide a hygienic and safe surface for the whole family.

If you are contemplating the renovation of your kitchen or bathroom and are looking for a material that perfectly harmonises aesthetics with advanced hygienic functionalities, we invite you to explore Marcelino Group’s wide range of granites. Contact us for more details and let our granites be the backbone of your next projects.

5 March, 2024 by Grupimar 0 Comments

Granite Properties in Construction: Strength and Durability

In the construction world, the choice of materials not only determines the aesthetics of a building but also its longevity and resilience against the ravages of time and weather. Thanks to the properties of granite, it ranks among the most revered materials by architects, builders, and designers. At Marcelino Group, with over six decades of experience in the extraction, processing, and marketing of granite, we have witnessed and contributed to the crucial role this material plays in modern construction, adding strength, beauty, and value to every project.


Historia del granito en la construcción



Granite has been synonymous with strength, durability, and beauty throughout the history of architecture and construction. This material, formed by nature over millions of years, has been chosen by various ancient civilizations to erect their most important constructions.

From Ancient Egypt, where the properties of granite were chosen to build parts of the pyramids and famous obelisks symbolizing eternity, to the Roman Empire, which incorporated it into majestic public buildings, columns, and monuments, granite has been a witness and protagonist of human history.

During the Middle Ages, granite continued to be a valued resource for constructing cathedrals, castles, and fortresses, thanks to its ability to withstand weather inclemencies and its low maintenance needs. This use extended throughout the Renaissance and modern era, where granite began to be appreciated not only for its functionality but also for its aesthetics, being used in facades, staircases, and as a decorative element in interiors and exteriors.

The tradition of using granite in emblematic constructions has been maintained to this day, adapting to new technologies and design trends. In the 20th century, granite has been a protagonist in the construction of institutional buildings, banks, memorials, and skyscrapers, symbolizing solidity, trust, and permanence.

At Marcelino Group, we take pride in continuing this millennial tradition, applying the most advanced extraction and processing technologies to offer the best properties of granite, capable of meeting the demands of the most modern and demanding construction projects. Our passion for this material and our commitment to excellence drive us to continue innovating, ensuring that granite remains a fundamental pillar in construction, now and in the future.


Physical Properties of Granite



Granite’s impressive presence and natural beauty are not only aesthetic pillars in construction but also symbols of strength and durability. This material combines a series of unique physical properties that make it a preferred choice for a multitude of construction applications. From its impressive hardness and resistance to its notable durability, the properties of granite offer a perfect balance between functionality and aesthetics.


Granite’s resistance

Granite’s resistance manifests in various forms, each contributing to its value and applicability in construction projects:

  • Compression Strength: Granite’s ability to withstand massive compressive loads without yielding makes it ideal for structural elements, such as pillars and supports.
  • Wear Resistance: Its surface effectively resists abrasion and wear caused by pedestrian and mechanical traffic, maintaining its appearance and texture over time.
  • Abrasion and Scratch Resistance: Granite’s mineral composition grants it superior resistance to abrasion and scratching, making it suitable for floors, countertops, and other surfaces exposed to constant impacts and rubbing.

Granite’s durability

Granite’s durability is equally impressive and reflected in several key dimensions:

  • Longevity: Granite has been the cornerstone of countless historical structures that have withstood the test of time, proving its ability to endure centuries with little or no sign of deterioration.
  • Minimal Maintenance: Unlike other materials that require regular care and treatments, granite needs minimal maintenance, making it a cost-effective and practical option in the long run.
  • Resistance to Environmental Conditions: Granite’s robust structure allows it to withstand extreme environmental conditions, including prolonged exposure to UV rays, thermal variations, and freeze-thaw cycles, without losing its integrity or aesthetics.

Granite in Modern Construction

Modern architecture and construction continue to rediscover granite, leveraging its unique properties to create spaces that are both functional and aesthetically impactful. In the contemporary era, granite’s properties have allowed it to consolidate itself as a material of choice for architects and designers looking to combine durability with natural beauty.

Innovation in Granite Extraction and Treatment

The introduction of advanced technologies in granite extraction and treatment has revolutionized how this material is used in construction projects. Marcelino Group is at the forefront of this innovation, employing state-of-the-art cutting and polishing techniques that allow for unprecedented precision and efficiency. This has not only increased the availability of granite for a wider range of applications but also improved the quality and uniformity of the finishes available.

Granite’s Versatility in Contemporary Applications


Granite has carved out a place in virtually all aspects of modern construction, from exterior claddings that withstand climatic variations without losing their splendor to elegant countertops in kitchens and bathrooms that combine durability with luxury. Additionally, granite is used in paving public spaces, where its wear resistance ensures a long lifespan even under intense pedestrian traffic.


Granite’s aesthetic versatility has also been a key factor in its popularity. The wide range of colors and textures available, from subtle grays and creams to vibrant reds and blues, allows designers to create unique and personalized environments. Marcelino Group, with its diverse portfolio of granites, has been a crucial partner for architects and designers in realizing their most ambitious visions.


Emblematic Projects with Granite



Marcelino Group has had the privilege of supplying granite for numerous emblematic projects around the world. From imposing skyscrapers that define the skylines of major metropolises to public squares that become the heart of cities. These projects not only demonstrate the functionality and aesthetics of granite but also its ability to harmoniously integrate into the urban and natural fabric, creating spaces that are timeless and, at the same time, deeply rooted in their contemporary context.

This extensive experience in major international works reflects the confidence that construction professionals place in our products.

The strength and durability are properties of granite that make it indispensable in the construction sector. At Marcelino Group, we not only provide top-quality material but also offer the experience and knowledge necessary to advise our clients in selecting the granite that best suits their projects, ensuring results that transcend time.

If you are planning a construction project and are looking for a material that combines beauty, strength, and durability, we invite you to discover the wide range of granites from Marcelino Group. Contact us for more information and let us be part of your next emblematic project.

31 August, 2023 by Grupimar 0 Comments

The extraction process in a granite quarry

The process of extraction and mining in a granite quarry is a task of significant scale and complexity that plays a crucial role in the proper acquisition of this valuable stone material. In this analysis, we will thoroughly explore the various stages involved in this process, from meticulous geological study to the mining operation itself. Granite, a plutonic igneous rock primarily composed of quartz, feldspar, and mica, stands out for its durability and is used in both architectural and ornamental applications. Meticulous focus and profound understanding of its extraction are essential to ensure an efficient and sustainable process.

Geological Characteristics and Location of Granite Quarries


The genesis of granite originates from the slow solidification of underground magma, facilitating the growth of crystals that are visible to the naked eye. This plutonic igneous rock is composed of quartz, feldspar, and mica, and is recognized for its durability and beauty. Granite quarries are located in geological areas rich in igneous rocks, often in mountain belts and regions with a geological history characterized by magmatic activity.

Stages of the Extraction Process in a Granite Quarry


The process of extraction and mining in a granite quarry consists of a series of interdependent stages that ensure efficient and safe acquisition of the material.

Geological Study and Prospecting


Before commencing extraction, a comprehensive analysis is carried out to determine the mining scope and production scale. This analysis involves evaluating natural, economic, and technical factors that will influence the operation. This ensures that extraction adapts to the specific conditions of the quarry and maximizes its efficiency and profitability.

Transport Development and Initial Loading


Transport development is crucial for establishing routes from the mine to points of natural stone transformation and the waste dump area. Methods such as road development and the use of mast crane systems without trench development are employed to optimize loading equipment efficiency. These methods allow flexibility and adaptation to changing operational needs.

Initial Extraction


Mining begins with the extraction of the upper layer, removing overlying soil and non-mineral rock layers covering the deposit. Excavation and splitting methods are used to separate rock from minerals, involving manual tools, drilling, wedging, and controlled cracking techniques. These processes are fundamental for exposing mineral reserves.

Granite Extraction


The extraction process can be carried out through two methods. First, controlled drilling and blasting of large granite stone blocks. Second, using diamond wire cutting equipment. In both cases, the aim is to obtain manageable-sized granite blocks for transport and subsequent transformation.

Block Cutting and Lifting


Granite blocks are cut using diamond saws into specific sizes and shapes as needed. Tools like manual jacks, hydraulic stone machines, and push air bags are used to perform this crucial task. Precision and safety are essential at this stage. Lifting these blocks from the quarry floor is done using cranes and other heavy lifting equipment.

Cleaning and Waste Transport


Crushed stone that doesn’t meet block standards is transported out of the block processing plant for proper disposal. Proper waste management is vital to ensure the operation’s sustainability.

Environmental and Social Considerations


Extraction and mining in granite quarries must address environmental and social concerns. Changes in the landscape, dust and noise emissions, and involvement of local communities are critical aspects to consider. Planning and implementing sustainable extraction practices are essential to mitigate negative impacts and promote equitable development.

Marcelino Group’s aggregate plant is a clear example of sustainability and environmental respect, as the waste and debris generated from granite are recycled and transformed into aggregates of various sizes. These are subsequently supplied to concrete plants, terrazzo factories, construction material warehouses, and more.

Furthermore, sector regulations mandate that once a quarry’s exploitation is complete, the responsible company must rehabilitate the affected areas. Many reclamation projects focus on creating lakes, parks, green spaces, as well as restoring local fauna and flora.



The process of extraction and mining in a granite quarry is a comprehensive and meticulous endeavor that spans from geological study to the formation of finished blocks. Each stage requires an analytical approach and specialized skills to ensure an efficient and sustainable operation. This analysis provides an in-depth view of the complexity involved in granite extraction and mining, essential components of the construction and ornamentation industry. Meticulous attention to each stage ensures the acquisition of high-quality blocks that satisfy both technical requirements and aesthetic demands.

28 July, 2023 by Grupimar 0 Comments

The most suitable types of granite for outdoor projects

Many new materials are being used for construction and decoration. However, granite continues to be a trend. Its characteristic strength and durability, as well as its elegance and design, make this type of rock used both indoors and outdoors. Its importance in the construction of facades and floors is why today we will show you the different types of granite most suitable for outdoor projects .

Why use granite for outdoor projects

Granite is a rock that has been used since time immemorial in the construction and decoration of both houses and buildings. The characteristics of this material make it one of the most better choices in the works.

This material is one of the most resistant to heat and humidity. In addition, due to its hardness, it is difficult to scratch, which makes it a durable material.

On the other hand, granite is a great thermal and acoustic insulator, which means greater energy savings for those who live in a house with a facade made of this material. In addition, this good behavior in the face of sudden changes in temperature helps to prevent dampness.

Regarding the aesthetic aspect, granite offers a great variety of possibilities with different finishes, textures and colors depending on its quarry. This makes it easy to combine with different materials and styles.

The versatility, timelessness and contemporary characteristics of the material make it a great investment when choosing it for an outdoor project.

Types of granite for outdoor projects

Grey granites

Gray and white granites are the great classics of natural granites. Although they are very present in today’s decoration and interior design, this type of granite offers an elegant look to the buildings it covers from the outside. In addition, they are neutral and timeless tones that combine perfectly with other materials.

Granite Gris Cadalso

Granite Gris Cadalso

The Cadalso Gray granite, from the quarry in Cadalso de los Vidrios, Madrid, combines easily with any style. It is a material widely used for the renovation of sidewalks, driveways and curbs.

Granite Gris Perla

Granite Gris Perla

The Pearl Grey granite from our quarry in Pontevedra is very useful when seeking to highlight exterior architectural elements.. In addition, due to its properties, this material maintains its appearance unaltered over time.

Granite Blanco Cristal

Granite Blanco Cristal

Finally, within this tonality we have theBlanco Cristal granite which offers luminosity and purity in the spaces used. Its use in exterior decoration provides greater harmony. In addition, its flamedand shot blasted finish is used for exterior facades and floors.

Blue granites

The use of blue granite, a chromatic palette with personal and inspiring shades, brings a sense of balance and serenity.

Granite Azul Platino

Granite Azul Platino

First of all, the Azul Platino granite from our quarry in Cáceres, is characterized by small interruptions of silver sparks that give it a greater amount of luster. This granite is ideal for contemporary decorations, regardless of style.

Granite Azul Plata

Granite Azul Plata

In the case of Blue Silver granite from the quarries of Avila, stands out for its bluish tonality combined with small grayish flecks that provide a greater brightness. It is very used in large pavements such as that of the Place Octogonale in France.

Granite Azul Noche

Granite Azul Noche

Finally, the exclusive Azul Noche extracted from the quarry of Avila, is characterized by its bluish megacrystals that reflect on the dark gray granite that makes it not lose sophistication on any occasion. Gives greater nobility to the floors and facades where it is used.

Pink Granites

Pink granite is widely used in both hotels and commercial buildings. However, it is increasingly used in home decoration.

Granite Crema Julia

Granite Crema Julia

On the one hand, we have the Crema Juliafrom the quarry in Valença, Portugal. Its good performance in humid environments makes it a favorite for facades and pavements. Its composition of black and white crystals creates a subtle atmosphere and integrates perfectly with other materials in neutral tones.

Granite Rosa Porriño

Granite Rosa Porriño

In the case of Rosa Porriño graniteborn in our quarry in Porriño, Spain, shares characteristics with the previous one in terms of behavior. Its particular, as well as elegant, coloring makes it a striking granite that enhances luminosity and projects diaphanous spaces.

Black Granites

Finally, we have black granite, whose varieties offer a sense of power, exclusivity and luxury.

Granite Negro Tezal

Granite Negro Tezal

In the case of Negro Tezal granite, a material extracted from our quarry in Huelva, it is a practical material and very easy to combine with any color due to its special coloring and temporality. It provides a classic design both in the pavements and in the coatings and facades used. In addition, its formal balance allows this granite to survive any aesthetic trend.

For more information we encourage you to discover our catalog.