sedimentary

Polished leopard jasper (likely orbicular jasper)

Microcrystalline quartz (SiO₂), commonly with hematite, iron oxides, and other silicates

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; multicolored red, cream, gray, black, and brown orbicular/brecciated patterns; opaque, waxy to vitreous luster; no visible cleavage; cryptocrystalline structure. The pictured piece is polished and likely shaped as a cabochon or palm stone.

Identified September 3, 2026More sedimentary →

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At a glance

Common name: Polished leopard jasper (likely orbicular jasper)
Scientific name: Microcrystalline quartz (SiO₂), commonly with hematite, iron oxides, and other silicates
Category: sedimentary
Identified: September 3, 2026
Method: Standard

AI Estimated Value

Approximately $5–$25 for a small polished stone; $25–$100+ for unusually vivid patterns or larger quality specimens.

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 cement volcanic or sedimentary material, with iron oxides producing red and brown colors and orbicular textures. It is generally Cenozoic or older, depending on the deposit.

Uses & applications

Used for cabochons, beads, carvings, polished stones, and decorative objects; valued mainly as an ornamental lapidary material.

Geological facts

“Leopard jasper” is a trade name rather than a single precisely defined mineral species; similar material may be sold as leopard skin jasper, ocean jasper, or orbicular jasper.

Field identification & locations

Identify by its opaque surface, strong red-black-cream patterning, lack of glass-like transparency, and inability to scratch it with a steel knife easily. Similar jasper occurs in Madagascar, Mexico, Indonesia, Brazil, and the western United States.