“Porto Katsiki” Paraiba Tourmaline 1.92 cts / 2 pcs
190149Product Details
Stone type: Paraiba Tourmaline
Weight: 1.92 cts / 2 pcs
Color: Greenish-blue
Dimension: 7.66 x 4.98 x 3.66 mm, 7.32 x 5.07 x 3.80 mm
Shape & Cut: Oval, Original cut
Certified: GRS
Treatment: Conventionally heated at low temperature
Refractive Index: 1.618-1.643
Hardness: 7-7.5
Specific Gravity: 3.1
Optical properties: Doubly refractive
Chemical formula: Complex Boron Silicate, Copper-bearing
Shipment from: Thailand
Return Policy: 3 Day Money-Back Return*
***No stone in generations, perhaps ever, had seen such a swift acceleration in value and caused such a buzz at an international trade event.***
(Extract from the book "Gemstones" by Vladyslav Yavorskyy)
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