mineral

Polished orbicular jasper (likely ocean jasper or leopard jasper)

Microcrystalline quartz (SiO₂) with iron-oxide pigments and altered volcanic inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; orange-brown and dark green mottling, opaque, with a glossy polished luster. It has cryptocrystalline quartz structure, no visible cleavage, and typical specific gravity near 2.6.

Identified August 14, 2026More mineral →

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At a glance

Common name: Polished orbicular jasper (likely ocean jasper or leopard jasper)
Scientific name: Microcrystalline quartz (SiO₂) with iron-oxide pigments and altered volcanic inclusions
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

Approximately $15–$60 for a polished palm-sized piece; unusually vivid, patterned, or locality-confirmed material may sell for $75–$200.

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

Formed when silica-rich fluids replaced or cemented volcanic rock, preserving rounded mineral or alteration patterns; many ocean jasper specimens formed in Oligocene–Miocene volcanic terrains. Exact locality cannot be confirmed from the photograph.

Uses & applications

Used for cabochons, carvings, polished eggs, spheres, and ornamental objects; it is not generally used as a structural stone. Value is primarily decorative and collectible.

Geological facts

The specimen appears water-worn or machine-polished rather than naturally exposed. Green areas may represent chlorite or other altered-mafic minerals, while orange coloration commonly comes from hematite or goethite.

Field identification & locations

Identify by its opaque patterned body, quartz-like hardness, lack of cleavage, and ability to take a high polish; it should scratch glass but not a hardened-steel file easily. Common jasper sources include Madagascar, India, Brazil, Mexico, and the western United States.