metamorphic

Blue-green serpentinite (likely copper-stained)

Serpentinite; chiefly serpentine-group minerals, commonly with malachite/chrysocolla or other copper minerals

AI-generated identification · may be incorrect

Dark blue-green, dull to waxy luster, massive and fine-grained with irregular fractures; typically Mohs 2.5–4, with variable hardness and specific gravity about 2.5–2.7. The rounded form suggests weathering or tumbling; the apparent copper-green patches are not diagnostic from the photograph alone.

Identified September 6, 2026More metamorphic →

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At a glance

Common name: Blue-green serpentinite (likely copper-stained)
Scientific name: Serpentinite; chiefly serpentine-group minerals, commonly with malachite/chrysocolla or other copper minerals
Category: metamorphic
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common rough piece; $30–$150+ if unusually attractive, polished, carved, or confirmed copper-mineral-bearing.

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 ultramafic mantle rocks such as peridotite hydrate during low-temperature metamorphism, commonly in ophiolites and subduction zones. Most exposed examples are Paleozoic to Cenozoic, though serpentinite can form at any geologic age.

Uses & applications

Used as ornamental stone, carvings, countertops, and historically for decorative objects; copper-bearing varieties may interest mineral collectors. Avoid dust generation because some serpentinites can contain asbestos-form minerals.

Geological facts

Serpentinite commonly feels smooth or slightly greasy and may show a mottled “turtle-shell” pattern. Similar-looking material includes nephrite jade, chlorite-rich rock, slag, and copper-stained basalt.

Field identification & locations

Check for a greasy/waxy surface, low hardness, green-black mottling, and possible white fibrous veins; a streak, hardness, specific-gravity, and copper-mineral test would improve identification. Common in California, Oregon, Washington, Italy, Greece, New Zealand, and many ophiolite belts.