igneous
Granite
Intrusive Igneous Rock
Hardness: 6-7 on Mohs scale. Colors range from pink, white, gray to black depending on mineral content. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained visible crystals). Cleavage: Varies by mineral constituent (feldspar and quartz). Specific Gravity: 2.65 - 2.75
- Hardness
- 6-7 on Mohs scale
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Colors range from pink, white, gray to black depending on mineral content. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained visible crystals). Cleavage: Varies by mineral constituent (feldspar and quartz). Specific Gravity: 2.65 - 2.75
Formation & geological history
Formed from the slow crystallization of magma below the Earth's surface over millions of years. Commonly found in continental crusts, such as the Andes mountain range near the given regional coordinates (33.2°S, 70.6°W).
Uses & applications
Widely used in construction for dimension stone, countertops, floor tiles, and monuments due to its durability.
Geological facts
Granite is the most common rock of the Earth's continental crust and is essentially absent on ocean floors. The location provided in central Chile is exceptionally rich in granitic intrusions associated with the Andean orogeny.
Field identification & locations
Easily identified by its speckled appearance showing interlocking crystals of quartz, feldspar, and biotite mica. Common worldwide in major mountain belts and shield areas.
