metamorphic

Polished serpentine-rich stone (likely serpentine jasper or “rainforest jasper”)

Serpentine-group minerals, chiefly antigorite/lizardite, with iron oxides and silica-rich rock matrix

AI-generated identification · may be incorrect

Green, brown, orange, and cream mottling with a polished waxy-to-glassy luster; typically Mohs 2.5–5.5, opaque, fine-grained, and lacking visible cleavage. The exact identification is uncertain from the image alone; it may also be a jasper-serpentine lapidary composite.

Identified August 16, 2026More metamorphic →

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At a glance

Common name: Polished serpentine-rich stone (likely serpentine jasper or “rainforest jasper”)
Scientific name: Serpentine-group minerals, chiefly antigorite/lizardite, with iron oxides and silica-rich rock matrix
Category: metamorphic
Identified: August 16, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small common polished stone; $30–$100+ for unusually attractive, well-finished 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

Serpentine forms when ultramafic mantle rocks such as peridotite hydrate during metamorphism, commonly in ancient oceanic crust and subduction zones; associated jasper-like material forms from silica-rich fluids. Geological ages vary widely.

Uses & applications

Used as a decorative stone, cabochon, carving, and ornamental object; softer varieties are unsuitable for heavy construction. Avoid generating dust, since some serpentinites can contain asbestos-group minerals.

Geological facts

The vivid green coloration commonly reflects serpentine minerals, while rusty orange-brown areas usually indicate iron oxides. Polishing can strongly enhance the color pattern.

Field identification & locations

Common sources include California, Italy, New Zealand, Canada, and Afghanistan. Field clues are low density, waxy polish, green alteration colors, and softness relative to quartz; hardness and streak tests would help distinguish it from jasper.