mineral

Brecciated jasper (likely ocean jasper or orbicular jasper)

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

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque cream, gray, reddish-brown and white fragments in a polished/tumbled matrix. Waxy to dull luster, cryptocrystalline quartz, no obvious cleavage; specific gravity roughly 2.5–2.7.

Identified August 16, 2026More mineral →

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At a glance

Common name: Brecciated jasper (likely ocean jasper or orbicular jasper)
Scientific name: Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and possibly carbonate inclusions
Category: mineral
Identified: August 16, 2026
Method: Standard

AI Estimated Value

Typically $5–$25 for a small common tumbled piece; $25–$100+ for attractive, locality-specific ocean or orbicular jasper.

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 cement and replace fractured volcanic or sedimentary material, with iron oxides producing the red-brown veining. Jasper is generally ancient, commonly Precambrian to Mesozoic, depending on locality.

Uses & applications

Used for cabochons, carvings, beads, tumblestones, ornaments, and decorative stone; occasionally used as a minor architectural material.

Geological facts

The angular contrasting fragments indicate brecciation, while the smooth surface appears tumbled or polished. Exact identification and locality require tests such as hardness, streak, acid reaction, and examination of thin sections.

Field identification & locations

Common sources include Madagascar, Indonesia, Mexico, India, Brazil, and the western United States. It is identified by its opaque silica body, strong patterning, lack of metallic cleavage, and inability to scratch glass only weakly or not at all unless quartz-rich.