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Unheated Tanzanite 0.93

Untreated Green blue purple Tanzanite
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Price:
$1,250.00
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0.93 Carat
Petrol Blue-Green 
Medium 60 to MD70
Free of Inclusions

Details:

GRADING REPORT CUTA093

Identification: Natural Unheated & Untreated Tanzanite

Carat: 0.93

Shape: Square Cushion

Measures: 5.56x5.53x3.85 (millimeter)

- Color Grade: Very Good

- Tone: M60-MD70

Color Zoning: Visible, shifting and gradual

Clarity: Free of Inclusions

Cutting Grade: Good (chip on side, not shoulder :-)

o       Brilliancy: 66% 

o       Depth: 68%

Origin: Tanzania

Treatment: None

 

Certificate No: IGI 320866239

 

Overall Grade: Very Good

Comment: IGI's color definition is 'Bluish Yellowish Green', with two primary colors and one secondary color we can mix almost colors except in the red spectrum. However, the first impression of this unheated tanzanite or rather zoisite is petrol green-blue from the front. From one side it is golden yellow, from the other side sky-blue/grass-green. We still call such a gem 'unheated tanzanite' though scientifically correct it is simply a 'natural untreated zoisite'. And who did guess we'd have so much more fun with these dazzling color-masters than with their boring and brittle standard-blue treated versions? Many have learned, though, as you can see from the fast sales in our never large inventory. This 0.93 comes in a very old hand-cut with a little back-side chip, which does not impede its beauty in any way but helps with the budget. 

  

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