metamorphic

Polished green jade (likely nephrite)

Nephrite jade, an interlocking amphibole aggregate dominated by tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

AI-generated identification · may be incorrect

Opaque to translucent mottled green with a waxy-to-greasy luster; Mohs hardness about 6–6.5 and unusually tough, with no obvious cleavage. The photo shows a polished cabochon; color alone cannot reliably distinguish nephrite from jadeite or other green stones.

Identified September 28, 2026More metamorphic →

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At a glance

Common name: Polished green jade (likely nephrite)
Scientific name: Nephrite jade, an interlocking amphibole aggregate dominated by tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂
Category: metamorphic
Identified: September 28, 2026
Method: Standard

AI Estimated Value

About $10–$100 for a small, common polished cabochon; quality, size, treatment, and verified origin can greatly affect value.

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 through metamorphism and fluid-driven alteration of magnesium-rich rocks, commonly in serpentinite-related settings. Jade deposits range from ancient to geologically recent; the specimen’s age and locality cannot be determined from the image.

Uses & applications

Used for carvings, beads, cabochons, jewelry, and ornamental objects; its toughness makes it suitable for durable carving.

Geological facts

“Jade” refers to two distinct materials: nephrite and jadeite. Nephrite’s tightly interlocking fibers give it exceptional toughness.

Field identification & locations

Nephrite occurs in places including British Columbia, Alaska, Siberia, New Zealand, and China. Identification requires testing or laboratory analysis; a polished green appearance is not diagnostic.