mineral

Polished jasper, likely ocean jasper or brecciated jasper

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions

AI-generated identification · may be incorrect

Opaque, rounded polished cabochon with brown, red, yellow, and gray banding; vitreous to waxy luster; hardness about 6.5–7 Mohs; no visible cleavage; cryptocrystalline structure; specific gravity about 2.5–2.7.

Identified August 16, 2026More mineral →

Explore Polished jasper, likely ocean jasper or brecciated jasper in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

At a glance

Common name: Polished jasper, likely ocean jasper or brecciated jasper
Scientific name: Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions
Category: mineral
Identified: August 16, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a typical polished palm stone; $25–$100+ for unusually vivid patterns, verified ocean jasper, or high-quality lapidary pieces.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms when silica-rich fluids replace or cement volcanic and sedimentary material, with iron producing the earthy colors; individual jasper deposits range from Precambrian to Cenozoic age. The specimen has been cut and polished.

Uses & applications

Used for cabochons, beads, carvings, ornaments, and lapidary collectibles; not generally used as a major construction stone.

Geological facts

Jasper is technically an opaque variety of chalcedony or microcrystalline quartz. The exact type cannot be confirmed from the photograph alone; “ocean jasper” is a trade name commonly applied to orbicular or multicolored jasper.

Field identification & locations

Identify by its opacity, fine grain, nonmetallic luster, and hardness sufficient to scratch glass; it should not fizz in dilute acid. Common sources include Madagascar, Brazil, India, Mexico, Australia, and the western United States.