igneous
Light-colored weathered stone, likely quartz-rich granite or quartzite
Tentative: granite (quartz + feldspar + mica); exact identification is uncertain from the image
AI-generated identification · may be incorrectGray-white, granular texture with possible quartz and feldspar; likely vitreous to dull luster, massive structure, and no obvious cleavage. Estimated hardness is about 6–7 Mohs and specific gravity roughly 2.6–2.7.
Identified More igneous →
Explore Light-colored weathered stone, likely quartz-rich granite or quartzite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Gray-white, granular texture with possible quartz and feldspar; likely vitreous to dull luster, massive structure, and no obvious cleavage. Estimated hardness is about 6–7 Mohs and specific gravity roughly 2.6–2.7.
Formation & geological history
If granite, it crystallized slowly from silica-rich magma deep underground, commonly during Precambrian to Phanerozoic plutonic events; weathering produced the irregular surface. If quartzite, it formed by metamorphism of sandstone.
Uses & applications
Ordinary material has little commercial value; comparable granite is used for aggregate, building stone, countertops, and monuments, while quartzite may be used as dimension stone and aggregate.
Geological facts
The image does not show diagnostic crystals clearly enough for a confident species-level identification. A fresh broken surface, hand lens, streak, and acid test would help distinguish granite from quartzite or another silicate rock.
Field identification & locations
Look for visible interlocking quartz and feldspar grains for granite; quartzite is more uniformly quartz-rich and commonly breaks across grains. Common sources include continental mountain belts and exposed crystalline bedrock.
