mineral

Likely weathered quartz-rich pebble

Quartz (SiO₂), possibly iron-stained quartz or quartzite

AI-generated identification · may be incorrect

Small rounded tan-gray specimen with a white/translucent patch and reddish-brown iron staining; likely Mohs hardness 7, vitreous to dull luster, no obvious cleavage, and a massive or granular structure. The image is insufficient for definitive identification.

Identified August 27, 2026More mineral →

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Physical properties

Formation & geological history

Probably a naturally weathered fragment derived from quartz vein material or quartzite; quartz formed in igneous, metamorphic, or hydrothermal settings over varied geologic ages, then accumulated as a transported pebble.

Uses & applications

Common quartz has uses in glass, ceramics, abrasives, electronics, and construction; attractive pieces may be collected, but this specimen appears to have little commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, commonly surviving as pebbles after softer surrounding rock erodes.

Field identification & locations

Test with a steel knife or glass: quartz should scratch glass and resist a knife, though surface coatings can mislead. A streak test, close inspection of translucency, and acid testing would help exclude limestone or slag.