mineral

Tumbled jasper (likely iron-stained chalcedony)

Microcrystalline quartz, SiO₂; jasper is an opaque variety of chalcedony

AI-generated identification · may be incorrect

Opaque, rounded orange-brown stone with mottled cream and dark patches and a polished, slightly glossy surface. Quartz hardness is 6.5–7 Mohs; trigonal crystal structure, no visible cleavage, specific gravity about 2.6.

Identified October 16, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids deposited and later silicified material in rock cavities or fractures; iron oxides produced the warm coloration. The specimen’s geological age and precise source cannot be determined from the image.

Uses & applications

Commonly tumbled for jewelry, beads, ornaments, and collecting; jasper is also used decoratively in carvings and small objects.

Geological facts

Jasper is an opaque chalcedony, colored and patterned by mineral impurities, especially iron oxides.

Field identification & locations

Its opacity, waxy-to-glassy polish, and mottled iron-rich colors fit jasper, but visual identification alone is uncertain. Jasper occurs worldwide in volcanic and sedimentary settings; this appears to be a small tumbled specimen.