mineral

Likely tumbled or polished jasper/chalcedony

Microcrystalline quartz, SiO₂; possibly opaque jasper or pale chalcedony

AI-generated identification · may be incorrect

Small rounded cream-to-pale green specimen with a dull-to-waxy luster and mottled interior. Quartz-group hardness is about Mohs 6.5–7, with no obvious cleavage and conchoidal fracture; fine details are limited by image blur.

Identified September 5, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich groundwater filled cavities or replaced volcanic sediment, later weathered and possibly polished. Such material commonly formed during the Cenozoic or older volcanic episodes, but age cannot be determined visually.

Uses & applications

Used for cabochons, beads, carvings, tumbled stones, and decorative objects; common pieces have modest value.

Geological facts

The pale color and opaque, cloudy texture fit jasper or chalcedony better than a crystalline amethyst or calcite. A hardness test and stronger light would distinguish it more reliably.

Field identification & locations

Common localities include volcanic regions worldwide, including Brazil, Madagascar, India, Mexico, and the western United States. It should resist scratching by a steel file and should not fizz in dilute hydrochloric acid.