igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Hardness: 6-7 Mohs; Color: Salt and pepper (white, grey, tan, black); Luster: Vitreous to dull; Crystal structure: Phaneritic (large, visible crystals); Specific gravity: 2.63 to 2.75
- Hardness
- 6-7 Mohs
- Color
- Salt and pepper (white, grey, tan, black)
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Salt and pepper (white, grey, tan, black); Luster: Vitreous to dull; Crystal structure: Phaneritic (large, visible crystals); Specific gravity: 2.63 to 2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface in continental crust environments, often during mountain-building events (Orogeny).
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, monuments, and as crushed stone for road base.
Geological facts
Granite is the primary constituent of Earth's continental crust and is found in the cores of all continents. It is one of the hardest and most durable common stones.
Field identification & locations
Identify in the field by its visible interlocking crystals of quartz (clear/grey) and feldspar (white/pink). Found worldwide in mountain ranges and eroded crystalline shields.
