Occurrence of Granite
Granite occurs as relatively small, less than 100 km2 stock-like masses and as large batholiths often associated with organic mountain ranges and is frequently of great extent. Small dikes of granitic composition called aplites are associated with granite margins. In some locations very coarse-grained pegmatite masses occur with granite. Granite has been intruded into the crust of the Earth during all geologic periods, except perhaps the most recent; much of it is of Precambrian age. Granite is widely distributed throughout the continental crust of the Earth and is the most abundant basement rock that underlies the relatively thin sedimentary rock veneer of the continents.
Origin of granite
There are two theories for the origin of granite. The magmatic theory states that granite is derived by the crystal fractionation of magma. Thus granite bodies are the result of intrusion of liquid magma into the existing rocks. The organization theory states that granite is formed in place by extreme metamorphism. There is evidence to support both theories, and both are useful to explain different observed features. The two may actually merge: as metamorphic conditions increase to the melting point of the metamorphosed granite, it will melt and become a liquid magma.
Varieties/Colors of Granites
Granite has been extensively used a dimension stone and as flooring tiles in public and commercial buildings and monuments.
- Black
- Gold/Yellow
- Green
- Brown
- Beige
- White
- Blue
- Pink
- Red
- Grey
- Ivory
- Juperana
Technical Specifications
Black Granite
Technical Data and Mechanical properties - Indicative lab test results
Apparent density |
2760 - 2910 kg/m3 |
EN 1936 |
Open porosity |
4 % vol. |
EN 1936 |
Water absorption |
0.01 – 0.06 % wt. |
EN 13755 |
Flexural strength |
16 – 21 MPa |
EN 12372 |
Compressive strength |
225 - 250 MPa |
EN 1926 |
Resistance to fixings |
1900 – 2100 N |
EN 13364 |
After Freezing |
2636 kg/cm2 |
- |
Hardness (Moh’s Scale) |
6-7 |
- |
- |
- |
- |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Star Galaxy/ Black Galaxy
Technical Data and Mechanical properties - Indicative lab test results
Apparent density |
2700 - 2910 kg/m3 |
EN 1936 |
Open porosity |
4 % vol. |
EN 1936 |
Water absorption |
0.02 – 0.06 % wt. |
EN 13755 |
Flexural strength |
16 – 21 MPa |
EN 12372 |
Compressive strength |
225 - 250 MPa |
EN 1926 |
Resistance to fixings |
1900 – 2100 N |
EN 13364 |
After Freezing |
2260 kg/cm2 |
- |
Ultimate Tensile Strength |
207 kg/cm2 |
- |
Hardness (Moh’s Scale) |
6.6 |
- |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
White Granite
Technical Data and Mechanical properties - Indicative lab test results
Apparent density |
2600 - 2615 kg/m3 |
EN 1936 |
Open porosity |
1.2 % vol. |
EN 1936 |
Flexural strength |
9 – 10 MPa |
EN 12372 |
Compressive strength |
160 - 190 MPa |
EN 1926 |
Water absorption |
0.39 – 0.43 % wt. |
EN 13755 |
Abrasion resistance |
15.5 mm (groove depth) |
EN 14157 |
After Freezing |
2260 kg/cm2 |
- |
Ultimate Tensile Strength |
207 kg/cm2 |
- |
Hardness (Moh’s Scale) |
6.20 |
- |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Blue Granite
Technical Data and Mechanical properties - Indicative lab test results
Compressive Strength |
2770 Kg/cm2 |
Comp. Strength after Gelivity |
2691 Kg/cm2 |
Ultimate Tensile Strength |
275 Kg/cm2 |
Coefficient Thermal expansion |
0.0044mm/mcº |
Water Absorption |
0.04% |
Impact Test-Min Fall Height |
68 cm |
Specific Gravity |
2.961 Kg/m3 |
Hardness (Moh's Scale) |
6.50 |
Density |
2363 Kg/M3 |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Yellow / Gold Granite
Technical Data and Mechanical properties - Indicative lab test results
Unitary modulus of bending tensile strength |
313 kg/cm2 |
Compressive Strength |
2777 Kg/cm2 |
Comp. Strength after Gelivity |
2690 Kg/cm2 |
Ultimate Tensile Strength |
279 Kg/cm2 |
Coefficient Thermal expansion |
0.0040mm/mcº |
Water Absorption |
0.040% |
Impact Test-Min Fall Height |
69cm |
Specific Gravity |
2.960 Kg/m3 |
Hardness (Moh's Scale) |
6.52 |
Density |
2363 Kg/M3 |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Brown Granite
Technical Data and Mechanical properties - Indicative lab test results
Compressive Strength |
2777 Kg/cm2 |
Comp. Strength after Gelivity |
2696 Kg/cm2 |
Ultimate Tensile Strength |
274 Kg/cm2 |
Coefficient Thermal expansion |
0.0044mm/mcº |
Water Absorption |
0.042% |
Impact Test-Min Fall Height |
68 cm |
Specific Gravity |
2.963 Kg/m3 |
Hardness (Moh's Scale) |
6.5 |
Mass By Unit Of Volume |
2682 kg/m3 |
Density |
2363 Kg/M3 |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Cream Granite
Technical Data and Mechanical properties - Indicative lab test results
Density |
2565 Kg/M3 |
Compressive Strength |
2777 Kg/cm2 |
Comp. Strength after Gelivity |
2696 Kg/cm2 |
Ultimate Tensile Strength |
274 Kg/cm2 |
Coefficient. Thermal expansion |
0.0045mm/mcº |
Water Absorption |
0.04% |
Impact Test-Min Fall Height |
68 cm |
Specific Gravity |
2.960 Kg/m3 |
Hardness (Moh's Scale) |
6.1 |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Red Granite
Technical Data and Mechanical properties - Indicative lab test results
Density |
2715kg/m3 |
Compression Tensile Strength |
1790 kg/cm2 |
Tensile Strength After Freeze-Thaw Cycles |
2168 kg/cm2 |
Unitary Modulus Of Bending Tensile Strength |
133 kg/cm2 |
Heat expansion coefficient |
0.0086 mm/mc |
Water Imbibition Coefficient |
0.003100 |
Mass By Unit Of Volume |
2777kg/m3 |
Impact Strength |
68cm |
Hardness (Moh's Scale) |
6.5 |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
Grey Granite
Technical Data and Mechanical properties - Indicative lab test results
Density |
2660 Kg/M3 |
Compressive Strength |
157.10MPa |
Comp. Strength after Gelivity |
2696 Kg/cm2 |
Ultimate Tensile Strength |
274 Kg/cm2 |
Coefficient. Thermal expansion |
0.0045mm/mcº |
Water Absorption |
0.62 mass |
Impact Test-Min Fall Height |
68 cm |
Specific Gravity |
2.960 Kg/m3 |
Hardness (Moh's Scale) |
6.1 |
Flexural Strength |
14.2 MPa |
This information is based on our present knowledge out of laboratory tests and other information sources. However, this shall not constitute a guarantee for any specific batch of stone, and shall not establish a legally valid contractual relationship.
