mineral

Tumbled green stone, likely serpentine or nephrite jade

Serpentine-group minerals (commonly antigorite/lizardite), possibly nephrite jade (intergrown tremolite–actinolite)

AI-generated identification · may be incorrect

Opaque mottled green, waxy to vitreous luster, rounded and polished; serpentine hardness ~2.5–4 Mohs, nephrite ~6–6.5. The image lacks diagnostic detail for a confident distinction; no visible crystal structure or cleavage.

Identified August 23, 2026More mineral →

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At a glance

Common name: Tumbled green stone, likely serpentine or nephrite jade
Scientific name: Serpentine-group minerals (commonly antigorite/lizardite), possibly nephrite jade (intergrown tremolite–actinolite)
Category: mineral
Identified: August 23, 2026
Method: Standard

AI Estimated Value

About $2–$15 as a common tumbled serpentine; approximately $10–$100+ if confirmed quality nephrite jade, depending on translucency, color, size, and workmanship.

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 ultramafic rocks hydrate during metamorphism; nephrite forms by metamorphic alteration involving magnesium-rich rocks. Both range from Paleozoic to younger and occur in ophiolites and metamorphic belts.

Uses & applications

Tumbled serpentine is used for ornaments, carvings, and inexpensive jewelry; nephrite is valued for cabochons and carvings. Serpentine also has limited architectural and decorative use.

Geological facts

Green color and mottling can resemble jade, but appearance alone cannot establish jade identity. A hardness, density, and microscopic examination would help distinguish them.

Field identification & locations

Common sources include California, New Zealand, China, Canada, and Russia. Check for a waxy feel and low hardness; avoid destructive tests unless provenance or identification is important.