igneous
Likely weathered quartz-bearing rock fragment
Indeterminate; possibly granitic or metamorphic quartz–feldspar aggregate
AI-generated identification · may be incorrectGray-brown, irregular and granular, with a dull to slightly vitreous luster; likely hardness about 6–7 Mohs if quartz-rich. No clear cleavage or diagnostic crystal faces are visible, and the specimen is too small for reliable mineral identification.
Identified More igneous →
Explore Likely weathered quartz-bearing rock fragment in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Gray-brown, irregular and granular, with a dull to slightly vitreous luster; likely hardness about 6–7 Mohs if quartz-rich. No clear cleavage or diagnostic crystal faces are visible, and the specimen is too small for reliable mineral identification.
Formation & geological history
Probably a naturally weathered fragment from an igneous or metamorphic outcrop; its geological age cannot be determined from the photograph. Surface staining appears consistent with iron-oxide weathering.
Uses & applications
Primarily a teaching or curiosity specimen; unexceptional fragments have no practical industrial or jewelry use. Identifiable, attractive pieces may be used in collections or crafts.
Geological facts
The pointed shape may reflect fracture and abrasion rather than a natural crystal termination. A hand lens, streak test, hardness test, and fresh broken surface would substantially improve identification.
Field identification & locations
Commonly found in soil, gravel, streambeds, and weathered bedrock worldwide. Check for visible quartz, feldspar, mica, layering, or fossils; avoid destructive tests if provenance matters.
