metamorphic
Yellow-green rough stone, possibly serpentine
Tentatively serpentine-group rock (serpentine minerals; composition and identity cannot be confirmed from the image)
AI-generated identification · may be incorrectA small, rounded, opaque yellow-green specimen with a dull to waxy-looking surface. Hardness, cleavage, crystal structure, and specific gravity cannot be reliably determined visually.
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Physical properties
A small, rounded, opaque yellow-green specimen with a dull to waxy-looking surface. Hardness, cleavage, crystal structure, and specific gravity cannot be reliably determined visually.
Formation & geological history
If serpentine, it formed through hydration and alteration of magnesium-rich ultramafic rock, commonly during metamorphism; such rocks occur in geological settings of many ages.
Uses & applications
Serpentine is used as decorative or carving stone and as a collector material; this specimen is too small and indistinct to assign a specific use.
Geological facts
Yellow-green color alone is not diagnostic; several minerals and weathered rocks can look similar.
Field identification & locations
Check hardness, streak, density, and texture, or have it tested; avoid identifying it as a gemstone from color alone. Serpentine occurs in ultramafic-rock belts worldwide.
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