igneous
Granite
Granite
AI-generated identification · may be incorrectHardness: 6-7 (Mohs scale), Color: pink/red (orthoclase feldspar), gray/clear (quartz), and black (biotite/hornblende), Luster: vitreous, Specific gravity: 2.6-2.8
- Luster
- vitreous, Specific gravity: 2
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Physical properties
Hardness: 6-7 (Mohs scale), Color: pink/red (orthoclase feldspar), gray/clear (quartz), and black (biotite/hornblende), Luster: vitreous, Specific gravity: 2.6-2.8
Formation & geological history
Intrusive igneous rock formed from the slow cooling of magma deep underground, often forming large plutons or batholiths.
Uses & applications
Widely used in construction, monuments, countertops, paving, and landscaping. Small polished pieces are sometimes collected or used in crafts.
Geological facts
The red/pink color is due to the presence of orthoclase feldspar. This piece appears to be a water-worn or tumbled pebble.
Field identification & locations
Identify by its coarse-grained (phaneritic) texture and the classic mix of quartz, feldspar, and dark minerals. Common worldwide in continental crust.
