metamorphic

Tumbled pale-green stone, likely serpentine

Serpentine-group minerals, broadly (e.g., antigorite or lizardite); identification is uncertain from the image

AI-generated identification · may be incorrect

Smooth, rounded, pale blue-green and faintly translucent, with a subdued waxy luster. Serpentine is typically Mohs 2.5–5.5, with a fine-grained or fibrous crystal structure; hardness and cleavage cannot be assessed from this photo.

Identified September 23, 2026More metamorphic →

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At a glance

Common name: Tumbled pale-green stone, likely serpentine
Scientific name: Serpentine-group minerals, broadly (e.g., antigorite or lizardite); identification is uncertain from the image
Category: metamorphic
Identified: September 23, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small common tumbled stone; higher only if confirmed as a desirable material or unusually fine piece.

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

Serpentine forms when magnesium-rich ultramafic rocks are altered by water, commonly during metamorphism. The pictured piece appears tumbled or polished; its geological age and source cannot be determined visually.

Uses & applications

Used as a decorative and carving stone, in jewelry, and as a collector specimen; value depends on identity, size, color, and finish.

Geological facts

Several pale-green minerals can look similar when tumbled, including serpentine, jade, and calcite; appearance alone cannot confirm the species.

Field identification & locations

The reported northwestern Washington area has varied local geology, but the photo is insufficient to connect the piece to that location. A hardness test, streak, and specific-gravity measurement—or gemological testing—would help distinguish serpentine from lookalikes.