igneous
Granite (likely weathered, coarse-grained granite)
Granite; chiefly quartz, feldspar, and dark mica or amphibole
AI-generated identification · may be incorrectVisible coarse, interlocking grains with mottled pink-brown, pale, and dark minerals; typically Mohs 6–7, vitreous quartz and feldspar luster, no regular cleavage in the whole rock, and specific gravity about 2.6–2.7.
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Physical properties
Visible coarse, interlocking grains with mottled pink-brown, pale, and dark minerals; typically Mohs 6–7, vitreous quartz and feldspar luster, no regular cleavage in the whole rock, and specific gravity about 2.6–2.7.
Formation & geological history
Intrusive igneous rock crystallized slowly from silica-rich magma deep in the crust, commonly over millions of years; the specimen’s age and exact origin cannot be determined from the image.
Uses & applications
Granite is used for building stone, paving, countertops, and monuments; this small rough piece is mainly suitable for collecting or display.
Geological facts
The speckled appearance reflects crystals large enough to see without magnification, a result of slow underground cooling.
Field identification & locations
Look for a hard, interlocking mix of light quartz/feldspar and darker minerals, rather than layered grains. Granite is widespread in continental crust; the photo alone cannot establish a specific locality.
