mineral

Yellow-brown tumbled stone, possibly jasper

Unidentified silica-rich material; possible microcrystalline quartz (jasper, SiO₂)

AI-generated identification · may be incorrect

Opaque to slightly translucent, rounded and polished, with a yellow-brown color and dark inclusions. If jasper, hardness is about 6.5–7 Mohs, luster is waxy to dull, and crystals are too fine to see; the image is insufficient to confirm its identity or specific gravity.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

If jasper, silica-rich fluids or sediments formed microcrystalline quartz, later colored by iron oxides; such material occurs in many geological ages and settings.

Uses & applications

Tumbled silica-rich stones are used in jewelry, crafts, and collections; exact uses depend on identification.

Geological facts

Iron oxides commonly produce yellow, ochre, and brown colors in quartz-rich stones.

Field identification & locations

A hardness or streak test and examination of a fresh surface can help distinguish jasper from other stones, but avoid damaging a potentially valuable specimen. Tumbled stones are sold worldwide.