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Ed Bristol
  

Untreated Spanish Sphalerite 2.33

free of treatments and free of inclusions chrome diopside without inclusions
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Price:
$1,450.00
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2.33 Carat
Neon Orange
Medium Dark 70
Lightly Included

Details:

GRADING REPORT NTOS233

- Identification: Natural Unheated & Untreated Sphalerite
- Carat: 2.33
- Shape: Kite Trillion
- Measures: 8.74x8.57x4.54 (millimeter)
- Color Grade: Excellent
- Tone: Medium Dark 70
- Color Zoning: None
- Clarity: Lightly Included (see comment)
- Cutting Grade: Excellent (precision cut)
  -> Brilliancy: 75%
  -> Depth: 53%
- Origin: Spain
Treatment: None

Certificate No: AIG G90716424BE

Overall Grade: Very Good+

Comment: Sphalerite is the less-known king or queen of fire and brilliancy in the gem world. Though not strictly extrapolative, sphalerite's dispersion is near four times higher than that of diamond, thrice as high as sphene or demantoid, five times higher than zircon etc., etc.. Such a miracle cannot come without trade-off, hence nature made sphalerite especially soft, softer than even sphene, and simply the opposite of diamond. However, precision cut, carefully set and lovingly worn there is nothing that beats this gem in the perhaps most desired feature of all gems: sparkling in rainbow-colors. If you consider setting a sphalerite, let the seller cover the risk. Once in a protective pendant, the gem shall be relatively safe. This 2.33 shows some inclusions under the lens; to the unaided eye they appear only as an interruption of luster. Remarkable vivid orange with a dash of yellow. Note the size, near 9x9mm from only 2.3 carats but no window.  

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