mineral

Polished green jasper (likely ocean jasper or serpentine-rich jasper)

Microcrystalline quartz, SiO₂, with iron-bearing and possibly serpentine/chlorite inclusions

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; opaque olive-green, brown, black, and cream coloration; glassy to waxy luster; cryptocrystalline quartz with no visible cleavage and conchoidal fracture. The rounded, glossy surface indicates tumbling or polishing.

Identified August 30, 2026More mineral →

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At a glance

Common name: Polished green jasper (likely ocean jasper or serpentine-rich jasper)
Scientific name: Microcrystalline quartz, SiO₂, with iron-bearing and possibly serpentine/chlorite inclusions
Category: mineral
Identified: August 30, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common tumbled specimen; $30–$150+ for unusually patterned, large, or high-quality lapidary 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

Forms when silica-rich fluids cement or replace volcanic or sedimentary material, with iron and other minerals producing the green-brown patterns. Jasper deposits are geologically diverse and may range from Precambrian to Cenozoic, depending on locality.

Uses & applications

Used for cabochons, beads, carvings, display stones, and lapidary objects; too variable and opaque for most faceted jewelry. Also collected as an ornamental stone.

Geological facts

The exact variety cannot be confirmed from a photograph; “ocean jasper,” green jasper, and serpentine-bearing jasper can look similar. Acid resistance and lack of cleavage help distinguish it from calcite-rich rocks.

Field identification & locations

Common sources include Madagascar, India, Brazil, Australia, and the western United States. A glassy polish, opaque interior, quartz-like hardness, and multicolored brecciated or orbicular pattern support jasper identification.