metamorphic

Green-gray tumbled stone, possibly nephrite jade

Possible nephrite (interlocking tremolite–actinolite amphibole); identification is uncertain from the photograph

AI-generated identification · may be incorrect

Smooth, rounded, opaque to slightly translucent stone with mottled green-gray color and a waxy-to-dull luster. Nephrite has Mohs hardness 6–6.5, a compact fibrous structure, and no obvious cleavage; this image alone cannot confirm the material.

Identified October 4, 2026More metamorphic →

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At a glance

Common name: Green-gray tumbled stone, possibly nephrite jade
Scientific name: Possible nephrite (interlocking tremolite–actinolite amphibole); identification is uncertain from the photograph
Category: metamorphic
Identified: October 4, 2026
Method: Standard

AI Estimated Value

About $1–$15 as an unidentified tumbled stone; confirmed jade value varies widely with quality and size.

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

If nephrite, it formed through metamorphic alteration of magnesium-rich rocks, commonly in serpentinite or along altered rock contacts; deposits range from ancient to geologically young.

Uses & applications

Tumbled stones are used for collecting, ornaments, and jewelry; confirmed nephrite is also carved into decorative objects.

Geological facts

Nephrite is one of the two minerals called jade, the other being jadeite; both can look similar but differ in mineral composition.

Field identification & locations

The rounded, polished surface suggests tumbling, but color and appearance are not diagnostic. Check hardness, heft, and structure, or seek gemological testing; nephrite commonly occurs in regions including British Columbia, New Zealand, and China.