metamorphic

Green serpentine (likely serpentine-rich stone)

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; composition approximately Mg₃Si₂O₅(OH)₄

AI-generated identification · may be incorrect

Small rounded, opaque pale-green specimen with a dull to slightly waxy luster and mottled surface. Serpentine minerals have Mohs hardness about 2.5–5.5, variable cleavage, and a monoclinic or platy/fibrous crystal structure; the photo alone cannot confirm the exact mineral or specific gravity.

Identified September 28, 2026More metamorphic →

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At a glance

Common name: Green serpentine (likely serpentine-rich stone)
Scientific name: Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; composition approximately Mg₃Si₂O₅(OH)₄
Category: metamorphic
Identified: September 28, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small, common rough pebble; higher values require confirmed identity, quality, or workmanship.

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 magnesium-rich ultramafic rocks, such as peridotite, are altered by water during serpentinization, commonly in oceanic crust and mountain belts. This alteration spans many geological ages; the specimen’s age and precise origin cannot be determined from the image.

Uses & applications

Serpentine is used as decorative stone, carvings, and sometimes jewelry; some varieties are cut or polished for ornamental use.

Geological facts

Serpentinization hydrates mantle-derived rock and can produce distinctive green rocks called serpentinites. Some serpentine varieties are fibrous asbestos minerals, so avoid grinding or creating dust from unidentified material.

Field identification & locations

The green color and waxy look are consistent with serpentine, but similar stones include jade and altered volcanic rock; hardness and mineral tests are needed for identification. Common sources include ultramafic-rock belts in California, Italy, New Zealand, and Canada.