mineral

Polished ocean jasper (orbicular jasper), probable

Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide and other mineral inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; multicolored red, green, gray, and yellow-brown patterns; vitreous to waxy luster; opaque, with no visible cleavage and conchoidal fracture. The smooth rounded surface indicates tumbling or natural water wear.

Identified August 10, 2026More mineral →

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At a glance

Common name: Polished ocean jasper (orbicular jasper), probable
Scientific name: Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide and other mineral inclusions
Category: mineral
Identified: August 10, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a small tumbled stone; $20–$100+ for an attractive patterned cabochon or verified collectible specimen.

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 fill cavities in volcanic rock, with iron and other oxides producing the colors and patterns; most ocean jasper is Oligocene–Miocene age (roughly 5–30 million years) from Madagascar. Exact identification is uncertain from the photograph.

Uses & applications

Used as a lapidary stone for cabochons, beads, carvings, and polished display pieces; generally decorative rather than industrial.

Geological facts

Ocean jasper is valued for orbicular “eye” patterns, though this specimen appears more brecciated or mottled than strongly orbicular. Similar material may be sold simply as jasper or polychrome jasper.

Field identification & locations

Identify by its opaque multicolor silica body, glassy/waxy polish, and lack of cleavage; common sources include Madagascar, Brazil, India, and the western United States. A specific locality requires testing or provenance.