Igneous
Granite
Granite
Hardness: 6-7 on Mohs scale. Color: grey, mottled with lighter and darker minerals. Luster: dull to faintly sparkling where quartz crystals reflect light. Crystal structure: coarse-grained, phaneritic texture. Typically lacks cleavage but can have jointing.
- Hardness
- 6-7 on Mohs scale
- Color
- grey, mottled with lighter and darker minerals
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Physical properties
Hardness: 6-7 on Mohs scale. Color: grey, mottled with lighter and darker minerals. Luster: dull to faintly sparkling where quartz crystals reflect light. Crystal structure: coarse-grained, phaneritic texture. Typically lacks cleavage but can have jointing.
Formation & geological history
Formed slowly from molten magma deep underground. Common in continental crust.
Uses & applications
Often used in construction, monuments, paving, and occasionally jewelry or decorative pieces when polished.
Geological facts
Granite is primarily composed of quartz, feldspar, and mica.
Field identification & locations
Identify by its coarse-grained texture and typical salt-and-pepper look. Very common in many mountain ranges and continental settings.
