igneous
Weathered granitic rock with a quartz or feldspar vein
Likely granite or granodiorite; chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse, speckled gray-brown texture with pale translucent grains and dark mica-like material; likely Mohs hardness 6–7, vitreous-to-dull luster, and no obvious cleavage in the overall rock. The rounded edges indicate natural weathering or abrasion.
Identified More igneous →
Explore Weathered granitic rock with a quartz or feldspar vein in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse, speckled gray-brown texture with pale translucent grains and dark mica-like material; likely Mohs hardness 6–7, vitreous-to-dull luster, and no obvious cleavage in the overall rock. The rounded edges indicate natural weathering or abrasion.
Formation & geological history
An intrusive igneous rock that crystallized slowly from magma deep underground, commonly during Precambrian to Phanerozoic mountain-building events. Surface weathering and erosion later exposed and rounded it.
Uses & applications
Common granite is used as crushed aggregate, dimension stone, countertops, monuments, and building material; ordinary hand specimens have little commercial value.
Geological facts
Quartz is typically glassy and scratches glass, while feldspar is commonly white, cream, or pink and may show cleavage. Exact identification would require a sharper image or tests such as streak, hardness, and acid reaction.
Field identification & locations
Look for interlocking visible crystals: gray or translucent quartz, white/pink feldspar, and black mica or amphibole. Granitic rocks are widespread in continental crust, especially mountain belts and exposed shield regions.
