Cobalt Blue Spinel 3.29 cts website

Cobalt Blue Spinel 3.29 cts

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Product Details

A rare sample of Cobalt Blue Spinel with intense color, elegant cushion shape, great clarity and brilliance. The size over three carats is considered exceedingly large for the cobalt-bearing natural Spinel, making it a coveted hunt for collectors and connoisseurs.

Stone type: Spinel
Weight: 3.29 cts
Dimension:  7.85 x 7.72 x 6.30 mm
Color:  Cobalt Blue
Shape & Cut: Cushion,  Yavorskyy  cut  
Certified:  GRS

***Gem-quality blue spinel is the result of intense metamorphic processes.***
(Extract from the book "Gemstones" by Vladyslav Yavorskyy)

Treatment: Unheated and Untreated (No Indications Observed)
Refractive Index: 1.712-1.782
Hardness: 7.5-8
Specific Gravity: 3.6
Optical properties: Singly refractive
Chemical formula: MgAl₂O₄
Shipment from: Thailand
Return Policy: 3 Day Money-Back Return*
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