igneous
Quartz-rich granite (likely leucocratic granite)
Granite, composed mainly of quartz and feldspar with minor dark minerals
AI-generated identification · may be incorrectCoarse-grained, pale gray-white with glassy quartz and blocky feldspar; quartz has Mohs hardness 7, feldspar about 6, and the rock has no consistent cleavage. The photo shows a rough, weathered fragment; exact mineral proportions cannot be confirmed visually.
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Physical properties
Coarse-grained, pale gray-white with glassy quartz and blocky feldspar; quartz has Mohs hardness 7, feldspar about 6, and the rock has no consistent cleavage. The photo shows a rough, weathered fragment; exact mineral proportions cannot be confirmed visually.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing visible crystals to grow; such rocks occur in ancient continental crust of many ages.
Uses & applications
Commonly used as dimension stone, countertops, monuments, paving, and aggregate; attractive pieces may be collected, but this fragment appears ordinary.
Geological facts
Granite is an intrusive igneous rock, not a single mineral; its pale color generally reflects abundant quartz and feldspar.
Field identification & locations
Look for interlocking visible crystals and a mixture of glassy quartz, pale feldspar, and occasional dark mica. Granite is widespread in continental mountain belts and exposed bedrock; confirm with a fresh surface rather than weathered rind.
