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Untreated Sillimanite Cat's Eye 1.03 (RCS103)

natural cat's eye gemstone sillimanite transparent with silver ray
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1.03 Carat
Strong Silver Ray
Free of Inclusions



  • Identification: Natural Unheated & Untreated Sillimanite Cat's Eye
  • Carat: 1.03
  • Shape: Roundish Oval Single Cabochon
  • Measures: 6.19x6.69x2.70 (millimeter)
  • Color Grade: n.a.
  • Tone: n.a.
  • Color Zoning: None
  • Clarity: Very Lightly Included
  • Cutting Grade: Very Good
    • Finish: Good (chip, visible only under lens)
    • Ray: Extra sharp, centered and well travelling
  • Origin: Madagascar
  • Treatment: None

Certificate No: BGL M21177

Overall Grade: Very Good

Comment: Nope, this is not a Chrysoberyl's cat's eye, but a newly discovered type of silimanite cat's eye from Madagascar, so far found in earthy green, opaque brown or honey colors, but here, for the first time, with almost 100% transparent bodies and free of inclusions, plus a strong shiny silver ray (which is impossible NOT to catch on photo, as we try to show the body color). Normal quality cat's eyes need a single light source to show their ray in all beauty, lower quality rays will react only to a torch, but the very best will show their ray in almost any light setting, like this one here. I tried but could not make an image WITHOUT ray even in lowest light. Luckily, we won't need a see-through image here, since its clarity is beyond doubt and no body-color needs defining. A chipped corner become visible only under the lens (but not on our 36hold images) and does not affect the ray. Almost round at first sight, it will fill a ladies ring with 6mm. If you have a gent's ring in mind, ask us for a bigger piece, though most are small, we'll be ready to hunt the biggest there is. 

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