Cobalt Blue Spinel Sri Lanka 2.51 cts
171014Product Details
One of the most prized varieties of Spinel, this Cobalt Blue Gem from Ceylon features the distinctive hue and coveted name on the report. Faceted as an oval, the Natural Cobalt Spinel displays great luster and clarity, and the rare size for this precious material two and a half carats.
Stone type: Spinel
Weight: 2.51 cts
Dimension: 9.25 x 6.69 x 5.08 mm
Color: Cobalt Blue
Origin: Sri Lanka
Shape & Cut: Oval, Yavorskyy cut
Certified: GRS
(Extract from the book "Terra Spinel " 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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