igneous
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
Hardness: 6-7 on Mohs scale; Color: Phaneritic texture with flecks of white, gray, and pink; Luster: Vitreous to dull; Crystal structure: Coarse-grained granular crystal matrix; Specific gravity: 2.63 to 2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Phaneritic texture with flecks of white, gray, and pink
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Phaneritic texture with flecks of white, gray, and pink; Luster: Vitreous to dull; Crystal structure: Coarse-grained granular crystal matrix; Specific gravity: 2.63 to 2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. It is a coarse-grained intrusive rock that typically forms at great depths within the continental crust over millions of years.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and resistance to weathering.
Geological facts
Granite is the most common igneous rock found on Earth's surface and makes up a large portion of the continental crust. It is primarily composed of quartz and feldspar with minor amounts of mica, amphiboles, and other minerals.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance and coarse-grained visible crystals that are tightly interlocked. It does not scratch easily with steel. It is found in large plutons or massifs in mountain ranges.
