mineral
Likely tumbled white quartz or quartzite pebble
Quartz (SiO₂), possibly quartzite
AI-generated identification · may be incorrectSmall, rounded, opaque white specimen with a dull-to-waxy luster; quartz hardness is Mohs 7, with no cleavage and conchoidal fracture. Grain size and internal texture are unclear from the image, so quartzite cannot be excluded.
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Physical properties
Small, rounded, opaque white specimen with a dull-to-waxy luster; quartz hardness is Mohs 7, with no cleavage and conchoidal fracture. Grain size and internal texture are unclear from the image, so quartzite cannot be excluded.
Formation & geological history
Quartz crystallizes from silica-rich igneous, hydrothermal, or sedimentary systems; quartzite forms when quartz sandstone is metamorphosed. The smooth shape suggests natural water abrasion or tumbling; age is indeterminate.
Uses & applications
Used in glass, ceramics, electronics, abrasives, countertops, and construction aggregate; attractive pieces may be sold as tumbled stones.
Geological facts
Quartz is one of Earth’s most abundant minerals and is chemically resistant, commonly surviving weathering as rounded pebbles.
Field identification & locations
Test with a steel knife or glass: genuine quartz should scratch glass and resist a knife. Common in river gravels, beaches, quartz veins, and landscaping stone; the image alone cannot distinguish it reliably from white marble or ceramic.
