mineral

Polished jasper

Microcrystalline quartz (SiO₂), commonly iron-oxide-rich

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque mustard-brown with gray-white bands, earthy to vitreous luster, and no visible crystal faces. It is a polished cabochon/tumbled piece, likely showing chalcedonic quartz and iron-oxide inclusions.

Identified August 19, 2026More mineral →

Explore Polished 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 groundwater replaces or fills volcanic and sedimentary material, with iron producing yellow-brown coloration. Formation ages vary widely, from Precambrian to younger volcanic settings.

Uses & applications

Used for cabochons, beads, carvings, and ornamental objects; it has modest jewelry and collector value.

Geological facts

The specimen’s broad opaque color fields and irregular banding are typical of jasper rather than transparent agate. Exact variety or locality cannot be determined reliably from the photograph alone.

Field identification & locations

Identify it by its opaque patterned appearance, glassy polish, and resistance to scratching; a steel file should not readily scratch it. Common sources include India, Madagascar, Brazil, Australia, and the western United States.