gemstone
Polished cabochon, possibly moonstone or opal
Not identifiable from the image; possible feldspar moonstone or opal (hydrated silica, SiO₂·nH₂O)
AI-generated identification · may be incorrectSmooth, rounded cabochon with a milky white body and orange internal reflection; hardness, luster, and crystal structure cannot be determined reliably from the photo.
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Physical properties
Smooth, rounded cabochon with a milky white body and orange internal reflection; hardness, luster, and crystal structure cannot be determined reliably from the photo.
Formation & geological history
If moonstone, it is a feldspar formed in igneous or metamorphic rocks; if opal, it formed as silica-rich water deposited gel in cavities. Geological age and locality are unknown.
Uses & applications
Cabochons are commonly used in jewelry and collected as cut gemstones.
Geological facts
The orange glow may be reflection from nearby lighting rather than a diagnostic optical effect; a gemological examination is needed for identification.
Field identification & locations
Check for moonstone’s moving blue-white sheen or opal’s shifting multicolored play-of-color, and confirm with refractive-index or other gem tests. The image alone does not establish a specific locality.
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