metamorphic

Tumbled greenish stone, possibly serpentine or weathered quartzite

Tentative: serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing

AI-generated identification · may be incorrect

Pale gray-green to tan, matte to weakly waxy luster, fine-grained and rounded by tumbling; likely hardness about 3–7 depending on composition, with no visible cleavage or crystals.

Identified September 13, 2026More metamorphic →

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At a glance

Common name: Tumbled greenish stone, possibly serpentine or weathered quartzite
Scientific name: Tentative: serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing
Category: metamorphic
Identified: September 13, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small common tumbled stone; potentially $20–$100+ if confirmed as attractive lapidary-grade 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

Pale gray-green to tan, matte to weakly waxy luster, fine-grained and rounded by tumbling; likely hardness about 3–7 depending on composition, with no visible cleavage or crystals.

Formation & geological history

If serpentine, it formed when ultramafic rocks were hydrated during metamorphism, commonly in ancient oceanic crust and tectonic boundaries. The specimen appears human-tumbled, so its original geological age and locality cannot be determined visually.

Uses & applications

Used as a decorative stone, carving material, and lapidary rough; serpentine is sometimes used for ornamental objects but is generally less valuable than jade.

Geological facts

Serpentine can resemble jade, but it is usually softer and less dense. Green color alone is insufficient for a confident identification; the image could also represent weathered quartzite or another silicate rock.

Field identification & locations

Field tests include hardness, streak, specific gravity, and translucency; serpentine typically scratches with a steel blade, while quartzite does not. Common sources include California, Italy, New Zealand, Canada, and the Ural Mountains.