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Unheated Ceylon Sapphire 0.82 (TRPBS082)

blue precision cut extra brilliant sapphire from Ceylon, unheated and natural, no window, IGI report
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0.82 Carat
Bright Sky Blue
Light Medium 40
Lightly Included



  • Identification: Natural Unheated & Untreated Sapphire
  • Carat: 0.82
  • Shape: Trillion
  • Measures: 5.66x5.72x3.69 (millimeter)
  • Color Grade: Very Good
  • Tone: Light Medium 40 (mix, see comment)
  • Color Zoning: None
  • Clarity: Lightly Included
  • Cutting Grade: Excellent (precision cut)
    > Brilliancy: 95%
    > Depth: 65%
  • Origin: Sri Lanka
  • Treatment: None

Certificate No: IGI 345841108 

Overall Grade: Very Good

Comment: Trillion cuts may be the best shape to capture brilliancy. Their luster is not rolling through the gems but rather blinking on-and-off in parts of the triangle. This produces a different type of light play, more unpredictable and spontaneous. In this bright blue sapphire luster shows in irregular and always changing bright sparks from a blue background. The efficient precision cut allowed a near 6x6mm face-up from under one carat and yet no window. No color-zoning but a parallel color axis, visible in the side image. There, see below, from the side, the gem shows a much deeper blue (Medium Dark 75). In the cut-axis, we see changing tones of the same hue, collecting into an overall Light Medium 40. IGI certified unheated and pedigree origin 'Sri Lanka.' Sparkly gem for a solitary ring up to size 6. Good choice for those who like their sapphires always blue but never dark.

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