Unheated 2.81ct Oval Cut Bi-Colour Tanzanite

$1,686.00

This unique tanzanite has not been heated, as almost all commercial pieces are, not only that but it is beautifully bi-colour making it a most intriguing stone. Depending on which angle the stone is viewed from, the two colour shift about the stone and also change between the dichroic colours of tanzanite.   


$600/ct

In Stock

Description

Stone   Type

 Zoisite- Tanzanite

Chemical   Composition

 (Ca2Al3(SiO4)(Si2O7)O(OH)) + (Cr,Sr)

Cut

 Oval Cut

Crystal   System

 Orthorhombic

Weight

 2.81ct 

Hardness

 6.5

Dimensions

 11x8.4x4.3mm

Specific   Gravity

 3.10–3.38

Colour

 Violet-Blue & Green-Yellow

Refractive   Index

  1.69–1.70

Treatment

 No Treatment

Birefringence

 0.006–0.018

Clarity

 VS

Reference Number

 LG130040

Origin

 Tanzania

Notes

 Standard Sourcing

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