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31 August, 2023 by Grupimar 0 Comments

El proceso de extracción en una cantera de granito

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.