igneous
Likely granite
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectPale gray-green with visible interlocking grains, probably quartz, feldspar, and dark mica or amphibole; hardness about 6–7 Mohs. The rough, weathered surface and image resolution make precise identification uncertain.
Identified More igneous →
Explore Likely granite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Pale gray-green with visible interlocking grains, probably quartz, feldspar, and dark mica or amphibole; hardness about 6–7 Mohs. The rough, weathered surface and image resolution make precise identification uncertain.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing crystals to grow; its age depends on the source deposit and cannot be determined from the image.
Uses & applications
Commonly used as building and paving stone, countertops, monuments, and decorative aggregate; this small rough fragment has little commercial value.
Geological facts
Granite composition and appearance vary widely, and weathering can alter feldspar minerals, giving surfaces a dull or greenish cast.
Field identification & locations
Look for interlocking light and dark mineral grains and quartz that resists scratching by a steel knife. Granite is widespread in continental crust; the specimen’s source location is unknown.
