igneous
Granite
Phaneritic intrusive igneous rock (Quartz, Feldspar, Mica)
Hardness: 6-7 Mohs; Color: Pink, gray, white, and black mottled; Luster: Vitreous to dull; Crystal structure: Phaneritic (large visible crystals); Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, gray, white, and black mottled
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, gray, white, and black mottled; Luster: Vitreous to dull; Crystal structure: Phaneritic (large visible crystals); Specific gravity: 2.63-2.75
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface. It is a major component of the continental crust and can be billions of years old, often found in mountain ranges or batholiths.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite is one of the hardest and most common rocks on the planet. The Pink Granite of Egypt was used to build the Great Pyramid of Giza's King's Chamber.
Field identification & locations
Field identification involves looking for a salt-and-pepper appearance with interlocking crystals of quartz (clear/gray) and feldspar (pink/white). It is found worldwide in continental regions.
