mineral

Tumbled jasper (likely ocean/picture jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide inclusions

AI-generated identification · may be incorrect

Opaque, orange-brown and cream mottling; dull to subtly waxy luster; conchoidal fracture; hardness about 6.5–7 Mohs; no visible cleavage. The rounded edges indicate tumbling or polishing.

Identified August 23, 2026More mineral →

Explore Tumbled jasper (likely ocean/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

Opaque, orange-brown and cream mottling; dull to subtly waxy luster; conchoidal fracture; hardness about 6.5–7 Mohs; no visible cleavage. The rounded edges indicate tumbling or polishing.

Formation & geological history

Jasper forms when silica-rich groundwater replaces or fills cavities in volcanic or sedimentary material, incorporating iron oxides that create orange and brown colors. Its exact geological age and locality cannot be determined from the photograph.

Uses & applications

Used for inexpensive cabochons, beads, carvings, tumbling, ornaments, and lapidary practice. Common pieces typically have modest collector value.

Geological facts

Jasper is an opaque variety of chalcedony, unlike translucent agate; color and pattern come largely from hematite or goethite impurities. A polished surface and rounded profile can make it resemble ceramic, but natural irregular patterning supports a stone identification.

Field identification & locations

Commonly found in volcanic terrains and silica-rich sedimentary deposits worldwide, especially the western United States, Madagascar, Brazil, and Australia. Confirm with a hardness test against glass and inspect for natural grain rather than uniform manufactured texture.