igneous
Granite
Granite (Felsic Intrusive)
AI-generated identification · may be incorrectHardness: 6-7 on Mohs scale. Color: Salt-and-pepper look with pink, white, and gray grains. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained visible crystals). Specific gravity: 2.65-2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Salt-and-pepper look with pink, white, and gray grains
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Salt-and-pepper look with pink, white, and gray grains. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained visible crystals). Specific gravity: 2.65-2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma deep within the Earth's crust (plutonic). Found in continental crust and mountain ranges, often billions of years old.
Uses & applications
Used extensively in construction for countertops, floor tiles, paving stones, monuments, and as crushed stone for road aggregate.
Geological facts
Granite makes up the majority of the Earth's continental crust. Mount Rushmore is carved into a massive granite batholith. It is one of the hardest and most durable natural stones.
Field identification & locations
Identify in the field by its interlocking visible crystals and lack of layering. Commonly found in mountainous regions or areas where glacial movement has deposited 'erratic' boulders.
