igneous
Granite Pebble
Granite
AI-generated identification · may be incorrectHardness: 6-7 on Mohs scale. Color: Mottled grey, white, tan, and black. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained).
- Hardness
- 6-7 on Mohs scale
- Color
- Mottled grey, white, tan, and black
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Mottled grey, white, tan, and black. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained).
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. Water tumbled, resulting in a smooth pebble shape.
Uses & applications
Decorative stone, landscaping, sometimes collected for tumbling.
Geological facts
Granite is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.
Field identification & locations
Can be identified by its coarse-grained texture and composition of quartz, feldspar, and mica. Commonly found in riverbeds and beaches where it has been smoothed by water action.
