mineral

Likely weathered quartz-rich stone

Probably quartz-bearing sandstone or milky quartz; exact identification requires testing

AI-generated identification · may be incorrect

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.

Identified August 8, 2026More mineral →

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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.