mineral

Polished brecciated jasper (likely ocean jasper or orbicular jasper)

Silica-rich chalcedony/microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque, waxy to dull luster, gray-green, cream, yellow, and orange zones with rounded dark orbicular patterns. Microcrystalline quartz has no visible cleavage and conchoidal fracture; density is roughly 2.5–2.7.

Identified August 19, 2026More mineral →

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At a glance

Common name: Polished brecciated jasper (likely ocean jasper or orbicular jasper)
Scientific name: Silica-rich chalcedony/microcrystalline quartz (SiO₂), with iron-oxide and other mineral inclusions
Category: mineral
Identified: August 19, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small polished piece; exceptional patterned cabochons or rare material may sell for $50–$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

Forms when silica-rich fluids replace or cement volcanic rock, producing brecciation, orbicules, and iron-oxide staining; commonly associated with Cenozoic volcanic environments. The exact variety cannot be confirmed from the image alone.

Uses & applications

Used for cabochons, carvings, slabs, and collector specimens; occasionally decorative stone, but generally unsuitable for major construction aggregate.

Geological facts

Orbicular patterns are caused by concentric mineral growth or altered volcanic fragments, not true fossil structures. Orange coloration typically reflects hematite or limonite.

Field identification & locations

Identify by its hardness, opaque waxy appearance, multicolored silica matrix, and resistance to scratching by steel; quartz or a glass tile can test it more reliably. Common sources include Madagascar, Oregon, Mexico, and Australia.