mineral
Likely polished jade or serpentine fragment
Indeterminate; possible nephrite jade (fibrous tremolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂) or serpentine-group mineral
AI-generated identification · may be incorrectSmall, pale green-white, opaque, smoothly polished and rectangular with rounded edges; likely waxy to silky luster and Mohs hardness about 5–6.5. The image is insufficient to distinguish jade from serpentine, soapstone, or another green mineral.
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Physical properties
Small, pale green-white, opaque, smoothly polished and rectangular with rounded edges; likely waxy to silky luster and Mohs hardness about 5–6.5. The image is insufficient to distinguish jade from serpentine, soapstone, or another green mineral.
Formation & geological history
Jade forms through metamorphism of magnesium-rich rocks, commonly in subduction-zone mélanges; serpentine forms by hydration of ultramafic mantle rocks. Ages vary widely from ancient to modern geological settings.
Uses & applications
Potentially used as a bead, carving blank, or decorative cabochon; true jade can be valuable, while common serpentine is inexpensive ornamental material.
Geological facts
Color alone cannot authenticate jade: density, hardness, toughness, microscopic texture, and laboratory testing are important. Nephrite is exceptionally tough because of its interlocking fibrous crystal structure.
Field identification & locations
Common jade sources include Myanmar, China, New Zealand, Canada, and Guatemala; serpentine is widespread. Check translucency, heft, scratch resistance, and specific gravity, but avoid destructive testing on a valuable piece.
