mineral

Polished orbicular jasper (likely ocean jasper or brecciated jasper)

Microcrystalline quartz (SiO₂), with iron oxides and accessory chlorite/zeolite minerals

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque, multicolored brown, gold, gray, green, and black with a waxy to vitreous polish. Massive cryptocrystalline quartz lacks cleavage; density is typically 2.5–2.7 g/cm³.

Identified August 15, 2026More mineral →

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At a glance

Common name: Polished orbicular jasper (likely ocean jasper or brecciated jasper)
Scientific name: Microcrystalline quartz (SiO₂), with iron oxides and accessory chlorite/zeolite minerals
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

About $10–$40 for a palm-sized polished common specimen; $50–$150 or more for unusually patterned, high-quality material.

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 volcanic fluids filled cavities or cemented volcanic fragments, with iron oxidation producing the yellow-brown colors. Most jasper is Paleozoic to Mesozoic or younger, depending on locality.

Uses & applications

Used for cabochons, carvings, worry stones, bookends, and lapidary collectibles; rarely used as construction stone.

Geological facts

The visible pattern reflects brecciation, flow banding, and mineral staining rather than large crystals. “Ocean jasper” is a trade name, not a single officially defined mineral species.

Field identification & locations

Identify it by its opaque, fine-grained texture, curved fracture, strong polish, and lack of visible quartz crystals; a steel file should barely scratch it. Common sources include Madagascar, Oregon, California, Mexico, and Australia.