mineral

Polished green-and-white stone, possibly serpentine or jade

Tentatively serpentine (Mg₃Si₂O₅(OH)₄) or nephrite jade (interlocking amphibole fibers)

AI-generated identification · may be incorrect

The rounded, polished specimen appears dark green, pale green, white, and black with a waxy-to-subvitreous luster. Serpentine has Mohs hardness 2.5–4; nephrite is tougher and about 6–6.5; crystal structure and specific gravity cannot be confirmed from the image.

Identified September 12, 2026More mineral →

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At a glance

Common name: Polished green-and-white stone, possibly serpentine or jade
Scientific name: Tentatively serpentine (Mg₃Si₂O₅(OH)₄) or nephrite jade (interlocking amphibole fibers)
Category: mineral
Identified: September 12, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 as an unidentified polished specimen; $50–$500+ if laboratory-confirmed quality jade, depending on color, translucency, 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 undergo hydration and metamorphism; nephrite forms through metamorphic alteration involving magnesium-rich rocks. Precise age and origin require locality and testing.

Uses & applications

Used as ornamental stone, beads, carvings, cabochons, and decorative objects; confirmed high-quality jade can be valuable, while common serpentine is inexpensive.

Geological facts

Green mottling and black veining are typical of serpentine-group material, but dyed marble, jadeite, or another polished stone can look similar.

Field identification & locations

Test cautiously: serpentine is relatively soft and may scratch with a steel point, whereas jade resists scratching and feels notably tough and dense. Confirm with hardness, specific gravity, refractive index, and microscopy; common sources include California, Italy, New Zealand, China, and Myanmar.