mineral

Polished tumbled jasper (possibly picture jasper)

Jasper, an opaque microcrystalline variety of quartz (SiO₂)

AI-generated identification · may be incorrect

Likely Mohs hardness 6.5–7; glossy polish with mottled brown, rust-red, cream, and gray patterns. Quartz has a trigonal crystal structure, though jasper’s crystals are too fine to see; no distinct cleavage.

Identified October 11, 2026More mineral →

Explore Polished tumbled jasper (possibly picture 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

Silica-rich fluids and sediments formed the microcrystalline quartz, with iron and other minerals producing the colors and patterns. Jasper deposits occur in rocks of many ages; the exact source and age cannot be determined from the image.

Uses & applications

Used for beads, pendants, cabochons, and decorative objects; polished specimens are popular with collectors.

Geological facts

Jasper’s patterns vary widely, and names such as picture jasper describe appearance rather than a separate mineral species.

Field identification & locations

The rounded shape and reflective surface suggest a tumbled, polished stone. Jasper is found worldwide, including in the United States, Australia, Brazil, and India; its opaque, patterned appearance helps distinguish it from transparent quartz.