mineral

Tumbled orbicular/patterned jasper (likely brecciated jasper)

Microcrystalline quartz (SiO₂) with iron-oxide and possibly calcite/chalcedony veining

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; dark gray to black with tan, cream, and rusty-brown branching veins; opaque, waxy to vitreous luster, cryptocrystalline quartz, and no obvious cleavage. The rounded surface indicates tumbling and polishing.

Identified September 21, 2026More mineral →

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At a glance

Common name: Tumbled orbicular/patterned jasper (likely brecciated jasper)
Scientific name: Microcrystalline quartz (SiO₂) with iron-oxide and possibly calcite/chalcedony veining
Category: mineral
Identified: September 21, 2026
Method: Standard

AI Estimated Value

Typically $3–$15 for a small tumbled stone; approximately $15–$40 if unusually attractive, large, or locality-labeled.

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 volcanic or sedimentary material, with iron oxides producing the brown veining; exact geological age and locality cannot be determined from the image. Common sources include Madagascar, India, Indonesia, Brazil, and the western United States.

Uses & applications

Used for cabochons, beads, carvings, decorative stones, and inexpensive polished specimens; it is generally ornamental rather than industrial.

Geological facts

Jasper is an opaque variety of chalcedony or microcrystalline quartz, and its patterns are produced by impurities, brecciation, and mineral-rich fluids. The specimen may also be sold under locality or trade names such as Picasso jasper, though visual identification alone is insufficient.

Field identification & locations

Identify by its opaque quartz-like body, very fine texture, glassy/waxy polish, and resistance to scratching by a steel knife; avoid acid and destructive tests. It is a polished tumbled geological specimen, not a crystal with visible crystal faces.