mineral
Likely weathered quartz-rich stone
Probably quartz-bearing sandstone or milky quartz; exact identification requires testing
AI-generated identification · may be incorrectSmall tan, opaque-to-translucent fragment with dull/waxy luster and irregular fracture; likely Mohs hardness about 6–7 if quartz-rich. No clear crystal faces or cleavage are visible.
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Physical properties
Small tan, opaque-to-translucent fragment with dull/waxy luster and irregular fracture; likely Mohs hardness about 6–7 if quartz-rich. No clear crystal faces or cleavage are visible.
Formation & geological history
Could be a naturally weathered quartz pebble or sandstone fragment formed in sedimentary environments; its geological age cannot be determined from the image.
Uses & applications
Common quartz-rich material is used in glass, ceramics, abrasives, and construction aggregate; this fragment has negligible practical or jewelry value.
Geological facts
The tan color may result from iron-oxide staining or weathering. A glass-scratch test and examination of its grain texture would help distinguish quartz from sandstone or calcite.
Field identification & locations
Look for visible sand grains, fizzing in dilute hydrochloric acid, and hardness: quartz-rich material scratches glass and does not fizz, while calcite is softer and fizzes. Common worldwide.
