metamorphic

Serpentine-bearing schist (likely chlorite–talc schist)

Ultramafic-derived greenschist; serpentine-group minerals, chlorite, talc, and possibly actinolite

AI-generated identification · may be incorrect

Typically green to gray, flaky or fibrous, with pearly to waxy luster and weak-to-moderate foliation; hardness commonly 2–4 Mohs, depending on talc, chlorite, and serpentine. The pale green translucent area is consistent with serpentine or chlorite-rich material.

Identified September 11, 2026More metamorphic →

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At a glance

Common name: Serpentine-bearing schist (likely chlorite–talc schist)
Scientific name: Ultramafic-derived greenschist; serpentine-group minerals, chlorite, talc, and possibly actinolite
Category: metamorphic
Identified: September 11, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small common hand specimen; higher prices require well-defined patterns, polishability, or confirmed locality.

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

Formed when magnesium-rich ultramafic rock was metamorphosed and hydrated, commonly during ocean-floor alteration or subduction; ages vary widely from Precambrian to modern tectonic belts.

Uses & applications

Used as an ornamental stone, carving material, and occasionally aggregate or dimension stone; attractive pieces are collected, though this specimen appears mainly of educational interest.

Geological facts

Serpentine rocks can contain trace chrysotile asbestos, especially when fibrous; avoid cutting, drilling, or generating dust unless professionally tested and controlled.

Field identification & locations

Identify by green coloration, soapy/waxy feel, low hardness, flaky foliation, and association with dark ultramafic minerals; common in ophiolites and tectonic zones worldwide, including California, Italy, New Zealand, and the Appalachians.