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Ed Bristol
  

Untreated Oregon Sunstone 4.43

Cold multicolor Oregon sunstone
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4.43 Carat (sold)
Cold Multi-Colour
Medium 50
Free of Inclusions

Details:

GRADING REPORT OBS443

  • Identification: Natural Unheated & Untreated Sunstone (copper-bearing labradorite feldspar)
  • Carat: 4.43
  • Shape: Oval Brilliant
  • Measures: 9.77x12.85x7.29 (millimeter)
  • Color Grade: Very Good (Tri/Quad-chroic)
  • Tone: M50
  • Color Zoning: Visible and Optical Phenomena
  • Clarity: Free of Inclusions
  • Cutting Grade: Excellent (precision cut)
  • Brilliancy: 95%
  • Depth: 75%
  • Origin: Oregon USA (Plush/Burns)
  • Treatment: None

Certificate No: D04976 (additional AGL on request)

Overall Grade: Excellent

Comment: Exceptionally clean and adamantine crystal in a brightly coloured Oregon Sunstone, the original untreated all-natural Labradorite Feldspar mined in the USA last year. I find moss green, mild orange, ochre yellow and metallic blue in mixed light situations (thus this would be a quad-chroic gem?). Fine glitter and tons of lustre. With near 13x10mm this is seriously big stone which will need a full ring-size or a fancy cocktail design. No visible inclusions under the lens, and only barely perceptible copper clouds. While many Sunstones are supposed to have a warm sheen or inner 'life', this one stands out with unusual brilliancy and a cold character. In the additional images and the 2nd handshot I have tried to capture this 'coldness'. Even under tungsten light (where most Sunstone beam up in warm hues), this stone stays in cold diamond-like glitter with just some bright orange.

Here is an article about this new exciting collector gem from the GIA.

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