metamorphic

Serpentine (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals such as lizardite, antigorite, or chrysotile; exact identification cannot be confirmed from the image alone.

AI-generated identification · may be incorrect

Pale green to dark green with a mottled, massive appearance and dull-to-waxy luster. Serpentine minerals are Mohs 2.5–5.5, generally monoclinic or trigonal; the specimen’s hardness and cleavage cannot be determined visually.

Identified September 23, 2026More metamorphic →

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At a glance

Common name: Serpentine (likely serpentinite)
Scientific name: Serpentinite, composed mainly of serpentine-group minerals such as lizardite, antigorite, or chrysotile; exact identification cannot be confirmed from the image alone.
Category: metamorphic
Identified: September 23, 2026
Method: Standard

AI Estimated Value

Rough common pieces are typically about $2–$20; attractive carvings or polished specimens may sell for more.

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 water alters magnesium-rich ultramafic rocks, commonly at or near tectonic plate boundaries. Such alteration occurs across geological ages; the specimen’s age is unknown.

Uses & applications

Serpentinite is used as decorative stone, carving material, and sometimes dimension stone; asbestos-bearing varieties require careful handling.

Geological facts

The name refers to its often snake-like colors and patterns. Not all serpentinite contains asbestos, but appearance alone cannot establish that it is asbestos-free.

Field identification & locations

The green, irregular mottling is consistent with serpentinite, but other green rocks can look similar; identification requires tests or laboratory analysis. Common in ophiolites and metamorphic belts.