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Untreated Cobalt Spinel 5.37 (SCO851)

Deep ultramarine blue Ceylon cobalt spinel
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Price:
$13,920.00
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5.37 Carat
Deep Ultramarine Blue

Medium Dark 80
Very Lightly Included

Details:


GRADING REPORT SCO851

 

- Identification: Natural Unheated & Untreated Cobalt Spinel

- Carat: 5.37

- Shape: Round

- Measures: 11.06-11.08x6.21 (millimeter)

- Color Grade: Good

- Tone: MD80

- Color Zoning: None

- Clarity: Very Lightly Included

- Cutting Grade: Excellent (precision cut by Wieland)

o       Brilliancy: 66%

o       Depth: 56%

- Origin: Sri Lanka

- Treatment: None

 

Certificate No: 11903 (off 8.51, can be remade on request) (see more images)

 

Overall Grade: Good

Comment: This certified cobalt spinel was precision cut in Germany from 8.51 carat. The day-light blue is a deep classic Ultramarine. In mixed light settings the gem throws purple and violet into the mix. Often hiding its colors on the dark side of MD80, one needs to appreciate a dark tone here and will be rewarded with surprising color flashes and brilliancy in good light and magic in sun. No inclusions visible to the eye, even under the lens hardly visible. See the before-images, the model cut synthetic spinel and the end results in the big images.

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