metamorphic

Weathered greenish metamorphic rock, possibly serpentinite

Serpentinite; chiefly serpentine-group minerals, commonly Mg₃Si₂O₅(OH)₄, with possible magnetite and chlorite

AI-generated identification · may be incorrect

The specimen appears pale green-gray, massive, fine-grained, and dull to slightly waxy, with irregular fracture and weathered surfaces. Serpentinite typically has Mohs hardness 2.5–4, no prominent cleavage, and specific gravity about 2.5–2.6; the image alone cannot confirm the identification.

Identified September 6, 2026More metamorphic →

Explore Weathered greenish metamorphic rock, possibly serpentinite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Weathered greenish metamorphic rock, possibly serpentinite
Scientific name: Serpentinite; chiefly serpentine-group minerals, commonly Mg₃Si₂O₅(OH)₄, with possible magnetite and chlorite
Category: metamorphic
Identified: September 6, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a common hand specimen; $30–$150+ for polished, patterned, or well-provenanced 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 ultramafic mantle rocks such as peridotite hydrate during metamorphism, commonly in oceanic crust and subduction zones. Serpentinization can occur from Precambrian to modern geological times.

Uses & applications

Used as decorative and architectural stone, carving material, and historically for countertops and tiles; attractive polished pieces are collected. Its asbestos-bearing varieties require caution during cutting or abrasion.

Geological facts

Green color and slick or waxy surfaces are characteristic, but similar-looking rocks include chlorite schist, altered basalt, and greenstone. A magnet may respond weakly if magnetite is present.

Field identification & locations

Common in ophiolites and fault zones, including California, Vermont, Italy, New Zealand, and many ultramafic terrains. Confirm with hardness, streak, magnetism, and ideally thin-section or X-ray analysis.