mineral

Polished jasper pebble (likely brecciated or ocean jasper)

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

AI-generated identification · may be incorrect

Opaque, dark reddish-brown polished surface with cream irregular patches; typically hardness 6.5–7 Mohs, vitreous to dull luster, cryptocrystalline quartz, no visible cleavage, and specific gravity about 2.5–2.7.

Identified September 4, 2026More mineral →

Explore Polished jasper pebble (likely brecciated or ocean jasper) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Jasper forms when silica-rich fluids replace or cement volcanic, sedimentary, or hydrothermal material, with iron oxides producing the red color. Its exact geological age and locality cannot be determined from the photograph.

Uses & applications

Used for cabochons, beads, carvings, polished stones, and decorative objects; common polished specimens generally have modest value.

Geological facts

The specimen appears tumbled or smoothly polished rather than naturally weathered. Cream areas may be quartz, chalcedony, or altered host material, while dark zones likely contain iron and manganese oxides.

Field identification & locations

Jasper should be opaque and resist scratching by a steel file; quartz-rich material can scratch glass, though testing may damage the polish. Common sources include India, Madagascar, Brazil, Mexico, Australia, and the western United States.