igneous
Likely weathered granite or granitic pegmatite fragment
Granite; chiefly quartz, feldspar, and minor mica (exact identification uncertain from the image)
AI-generated identification · may be incorrectPale gray to cream, fine- to medium-grained, with dark specks and a granular texture; likely Mohs hardness 6–7, vitreous quartz luster, and no obvious cleavage at specimen scale. Specific gravity is approximately 2.6–2.7.
Identified More igneous →
Explore Likely weathered granite or granitic pegmatite fragment in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Pale gray to cream, fine- to medium-grained, with dark specks and a granular texture; likely Mohs hardness 6–7, vitreous quartz luster, and no obvious cleavage at specimen scale. Specific gravity is approximately 2.6–2.7.
Formation & geological history
Formed when silica-rich magma slowly crystallized deep underground, likely during an ancient continental igneous event; the specimen appears naturally weathered or broken from exposed rock.
Uses & applications
Common granite is used for construction aggregate, countertops, monuments, and dimension stone; small pieces have modest value as teaching or collecting specimens.
Geological facts
The dark grains may be biotite or hornblende, while the pale matrix is probably feldspar and quartz. A hand lens can reveal interlocking crystals typical of intrusive igneous rock.
Field identification & locations
Common worldwide, especially in continental mountain belts and shields. Identify it by its visible interlocking grains, lack of layering or fossils, and scratch resistance greater than glass; a streak test and close inspection would improve certainty.
