igneous
Granite-like rock
Coarse-grained felsic intrusive rock; likely granite or granodiorite
AI-generated identification · may be incorrectGray, speckled, massive rock with visible light and dark grains, probably quartz, feldspar, and biotite or hornblende. Hardness is roughly 6–7 Mohs; vitreous quartz and feldspar grains, no obvious cleavage at specimen scale, and specific gravity about 2.6–2.8.
Identified More igneous →
Explore Granite-like rock in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Gray, speckled, massive rock with visible light and dark grains, probably quartz, feldspar, and biotite or hornblende. Hardness is roughly 6–7 Mohs; vitreous quartz and feldspar grains, no obvious cleavage at specimen scale, and specific gravity about 2.6–2.8.
Formation & geological history
Formed when silica-rich magma cooled slowly deep underground, allowing crystals to grow; commonly Precambrian to Phanerozoic in age. The exact identification and age require thin-section or chemical analysis.
Uses & applications
Used extensively as building stone, countertops, monuments, aggregate, and crushed stone; attractive pieces may be collected but this specimen appears ordinary.
Geological facts
Granite commonly develops coarse “salt-and-pepper” texture, while granodiorite contains relatively more dark minerals and plagioclase. Weathering can round exposed fragments and dull their surfaces.
Field identification & locations
Look for interlocking visible crystals, abundant pale feldspar or quartz, and a granular texture; it should not show layering or foliation. Common worldwide in continental crust and mountain batholiths.
