metamorphic
Likely polished tiger’s-eye with dark matrix
Quartz (SiO₂) with fibrous crocidolite-derived inclusions; possibly an iron-rich jasper or other dark host rock
AI-generated identification · may be incorrectThe small cut piece has a tan-brown, opaque groundmass and a shiny black, irregular patch with a yellow spot. Tiger’s-eye is typically Mohs 7, vitreous to silky, and shows a moving golden chatoyant band; that distinctive effect is not clear here, so identification is uncertain.
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Physical properties
The small cut piece has a tan-brown, opaque groundmass and a shiny black, irregular patch with a yellow spot. Tiger’s-eye is typically Mohs 7, vitreous to silky, and shows a moving golden chatoyant band; that distinctive effect is not clear here, so identification is uncertain.
Formation & geological history
Tiger’s-eye forms when silica replaces fibrous crocidolite, commonly during low-grade metamorphism. The image alone cannot establish that this specimen is tiger’s-eye or determine its age; local West Virginia rocks are largely sedimentary, making a locally sourced tiger’s-eye unlikely.
Uses & applications
Tiger’s-eye is used for beads, cabochons, carvings, and decorative objects; ordinary small fragments have little commercial value.
Geological facts
The glossy patch could also be a coating, mineral inclusion, or residue rather than part of the tan stone. A close-up under angled light may reveal tiger’s-eye’s characteristic shifting bands.
Field identification & locations
Look for a smooth, moving golden-brown light band across the surface to confirm tiger’s-eye; without it, the photo is insufficient for a specific identification. Estimated value: under $1 for this small unidentified fragment; a finished tiger’s-eye cabochon commonly sells for about $5–$30.
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