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Unheated Color-Change Sapphire 3.21 (CCOS321)

Color changing Tanzanian sapphire from green to orange
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3.21 Carat
Medium Dark 65
Lightly Included



  • Identification: Natural Unheated & Untreated Sapphire
  • Carat: 3.21
  • Shape: Oval
  • Measures: 9.65x8.08x5.50 (millimeter)
  • Color Grade: Very Good
  • Tone: MD65
  • Color Zoning: Gradually
  • Clarity: Lightly Included
  • Cutting Grade: Excellent (precision cut by Conny F.)
    • Brilliancy: 80%
    • Depth: 68%
  • Origin: Tanzania
  • Treatment: None

Certificate No: GB14010782

Overall Grade: Very Good

Comment: Color-change sapphire from Tanzania: Unlike the 'classic' sapphire-move between purple and blue, Tanzanian sapphires remind of alexandrites and some CC garnets. This 3.21 carat moves between olive green and yellow-orange. Precision cut in Sweden to over 9x8mm and filled with a multitude of tranquil colors, from moss green to copper, olive to golden caramel, from metallic green to terracotta-orange, and reverse, with all imaginable (and unimaginable) mélanges in-between. Serious size in an unheated sapphire, facing up like a 4+ carat. A unique character, sophisticated, with interesting details under the lens (see 'more images'), yet eye-clean and with full brilliancy. The infinite play of light and color left us with over a dozen of 'undeletable' images, each showing a different aspect to the considerate observer. Colored (!) needles punch like comets through the gem's body; visible only under the lens but producing a glittery sheen. At mere $2k/ct, this gem is a bargain off the beaten path, satisfaction guaranteed: Frequently, after years, we hear back from buyers of Tanzanian color-changers reporting how they never stopped surprising with new impressions and colors (not a concept for frequent replacement-sales but happy owners nevertheless). 

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