sedimentary

Polished leopard jasper (likely orbicular/rhyolitic jasper)

Silicified volcanic rock, mainly microcrystalline quartz (SiO₂), with iron-oxide and clay-rich inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque, multicolored red, brown, yellow, cream, and black patterns; earthy to waxy luster; no visible cleavage; compact, fine-grained structure. The green cabochon appears to be a separate mounted stone, possibly aventurine or jade, rather than part of the specimen.

Identified August 28, 2026More sedimentary →

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At a glance

Common name: Polished leopard jasper (likely orbicular/rhyolitic jasper)
Scientific name: Silicified volcanic rock, mainly microcrystalline quartz (SiO₂), with iron-oxide and clay-rich inclusions
Category: sedimentary
Identified: August 28, 2026
Method: Standard

AI Estimated Value

About $10–$50 for a polished palm stone; $30–$150+ if unusually large, attractive, or set as jewelry.

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 ash and breccia, preserving orbicular or flow-like patterns; commonly Cenozoic to older, depending on locality. The polished, rounded form is human-finished.

Uses & applications

Used for decorative slabs, cabochons, beads, carvings, and ornamental objects; valued mainly for pattern and polish.

Geological facts

“Leopard jasper” is a trade name, not a single formally defined mineral species. Similar material is also sold as leopard skin jasper or orbicular jasper.

Field identification & locations

Identify by its very fine grain, opacity, strong red-yellow-black patterning, and inability to scratch easily with a steel blade. The reported Alberta location makes jasper and silicified volcanic material plausible, though the exact variety cannot be confirmed from a photo.