Royal Indigo Tourmaline 3.05 cts website

Royal Indigo Tourmaline 3.05 cts

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Product Details

Stone type: Tourmaline no heat
Weight:  3.05 cts
Dimension: 8.8 x 8.2 mm
Color:  Blue
Shape & Cut: Cushion, Yavorskyy cut

***Brazil has always been the principal source of tourmaline of all colors. Indicolite  is also found in Afghanistan and Pakistan, but the progress made in mining in Africa makes it highly competitive.***

(Extract from  INDICOLITE chapters of the book "Gemstones.Terra Connoisseur" by Vladyslav Yavorskyy)

Treatment: Unheated and Untreated (No Indications Observed)
Refractive Index: 1.618-1.643
Hardness: 7-7.5
Specific Gravity: 3.1
Optical properties: Doubly refractive
Chemical formula: Complex Boron Silicate
Shipment from: Thailand
Return Policy: 3 Day Money-Back Return*

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