mineral

Polished brecciated jasper (likely ocean jasper or jasp-agate)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque brown, orange, yellow, cream, and purple coloration; vitreous to waxy polish; no visible cleavage; cryptocrystalline quartz structure; specific gravity roughly 2.5–2.7.

Identified August 30, 2026More mineral →

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At a glance

Common name: Polished brecciated jasper (likely ocean jasper or jasp-agate)
Scientific name: Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities
Category: mineral
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Approximately $10–$40 for a palm-sized polished common specimen; $50–$150+ if it is confirmed high-quality Madagascar ocean jasper or an unusually attractive cabochon.

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 or sedimentary material, with iron and manganese producing the earthy colors. The specimen is geologically ancient, commonly associated with volcanic terrains, though its exact age and locality cannot be determined from the image.

Uses & applications

Used for cabochons, beads, carvings, worry stones, and decorative objects; polished pieces are popular among collectors but generally have modest commercial value.

Geological facts

The angular cream and purple patches suggest brecciation or jasper–chalcedony veining. Purple tones may reflect manganese minerals or amethystine quartz rather than true purple jasper.

Field identification & locations

Identify it by its opaque multicolor pattern, glassy polish, lack of cleavage, and resistance to scratching; it should not be scratched by a steel blade. Common sources include Madagascar, Oregon, India, Brazil, and Indonesia.