1.71-Carat Fancy Unheated Tanzanite

1.71-Carat Fancy Unheated Tanzanite



A gorgeous violet-blue fancy unheated tanzanite cut in our custom “Hyperbola” brilliant oval design, 1.71 carats.

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SKU: ET1940 Categories: , Tags: , , , , ,


This gem was faceted from an unheated piece of tanzanite–most tanzanite has been heated to remove the orange-brown and greenish-yellow components and to turn the gem to a dark blue to purple-blue color. We prefer the natural mixed colors and pastel tones of unheated Tanzanite (sometimes called “Fancy Tanzanite” or “Fancy Zoisite”).  Tanzanite is the trade name for deep blue to blue-purple Zoisite that is found in only one location on the earth–the hills of Merelani, Tanzania.  This particular Tanzanite was cut to show a mix of violet and blue. It also changes color under incandescent light to a more uniform light purple color. This Tanzanite has slight inclusions that are just barely visible to the naked eye. The inclusions have been factored into the price, making this a great value for the size and color.

This Tanzanite is faceted in our custom “Hyperbola” brilliant oval design. The gemstone weighs 1.71 carats and measures 7.9 x 6.7 x 5.0 mm.

Additional information

Weight 8 oz
Dimensions 6 × 4 × 4 in

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Product Enquiry

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We're often asked about this, and yes, we do include our own certificate of origin and authenticity.  You can learn more here: https://www.earthstreasury.com/what-about-a-certificate/

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We have a one-week review and return policy that starts the date you receive your gem.  We want you to be 100% sure you have the right gem.  Learn more here: https://www.earthstreasury.com/risk-free-review-and-return-policy/