igneous
Small granitic rock fragment
Granite or granodiorite; chiefly quartz, feldspar, and minor mica/amphibole
AI-generated identification · may be incorrectLight gray, coarse crystalline, and speckled with darker grains; likely Mohs hardness 6–7, vitreous to dull luster, no obvious cleavage as a whole, and specific gravity about 2.6–2.8.
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Physical properties
Light gray, coarse crystalline, and speckled with darker grains; likely Mohs hardness 6–7, vitreous to dull luster, no obvious cleavage as a whole, and specific gravity about 2.6–2.8.
Formation & geological history
A plutonic igneous rock formed by slow cooling of silica-rich magma deep in Earth’s crust, commonly during Precambrian to Phanerozoic mountain-building events.
Uses & applications
Used widely as crushed stone, aggregate, dimension stone, countertops, monuments, and building material; this tiny fragment has negligible commercial value.
Geological facts
The visible grain pattern reflects interlocking crystals that cooled slowly underground; exact identification requires a closer view or tests for quartz and feldspar.
Field identification & locations
Identify it by its hard, granular texture, pale feldspar/quartz grains, and scattered dark minerals; common worldwide, especially in continental mountain belts and exposed batholiths.
