Cobalt Blue Spinel 2.57 cts
22659Product Details
Stone type: Spinel
Weight: 2.57 cts
Dimension: 8.79 x 6.93 x 5.85 mm
Color: Cobalt Blue
Origin : Tanzania
Shape & Cut: Oval, Yavorskyy cut
Certified: GRS
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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