igneous
Likely weathered granite or granitic gneiss
Granite; mainly quartz, feldspar, and minor mica/amphibole
AI-generated identification · may be incorrectGray, coarse-grained, dull to weakly sparkly, with rounded weathered surfaces and possible feldspar/quartz grains. Typical hardness is about 6–7 Mohs; massive texture and poor cleavage overall, though feldspar cleavage may be visible.
Identified More igneous →
Explore Likely weathered granite or granitic gneiss in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Gray, coarse-grained, dull to weakly sparkly, with rounded weathered surfaces and possible feldspar/quartz grains. Typical hardness is about 6–7 Mohs; massive texture and poor cleavage overall, though feldspar cleavage may be visible.
Formation & geological history
Formed by slow crystallization of silica-rich magma deep underground, generally during Precambrian to Phanerozoic continental crust formation; surface weathering rounded the fragment.
Uses & applications
Commonly used as crushed stone, aggregate, paving, countertops, monuments, and building stone; ordinary hand specimens have little commercial value.
Geological facts
The image is slightly blurred, so exact identification is uncertain; its pale gray color and granular appearance are consistent with granite, but quartz-rich sandstone or another weathered silicate rock is possible.
Field identification & locations
Look for interlocking visible grains: glassy gray quartz, white or pink feldspar, and black mica. Common worldwide, especially in continental shield and mountain regions; a fresh broken surface is more diagnostic than the weathered exterior.
