mineral

Tumbled jasper (likely ocean or picture jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral impurities

AI-generated identification · may be incorrect

Opaque, rounded and polished; earthy brown, reddish, olive, and yellow tones with a waxy-to-glassy luster. Mohs hardness 6.5–7; no cleavage; trigonal microcrystalline quartz structure; specific gravity about 2.55–2.70.

Identified September 11, 2026More mineral →

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At a glance

Common name: Tumbled jasper (likely ocean or picture jasper)
Scientific name: Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral impurities
Category: mineral
Identified: September 11, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a common tumbled piece; $20–$75 or more for unusually patterned, large, or documented-locality 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

Jasper forms when silica-rich fluids replace or cement volcanic, sedimentary, or hydrothermal material, with iron oxides producing the brown-red colors. The specimen has been human-tumbled and polished; its precise geological age cannot be determined from the image.

Uses & applications

Used for cabochons, beads, carvings, ornaments, and decorative stone; it has modest value unless patterns, locality, or polish are exceptional.

Geological facts

Jasper is an opaque variety of chalcedony and is commonly grouped with quartz despite its fine-grained texture. Color zoning and orbicular or landscape-like patterns are characteristic of named varieties.

Field identification & locations

Identify by its opacity, fine texture, earthy iron-rich colors, lack of visible crystal faces, and resistance to scratching by steel. Common sources include India, Madagascar, Brazil, Australia, Mexico, and the western United States.