Customers questions have been pouring in regarding Heat treated Tanzanite versus non heat treated Tanzanite:
Summary: Top color Tanzanite are all heated, either by man, or By the earth in nature,(Geothermal Heat) there have been a lot of sellers claiming they are selling NON heated Tanzanite, what they should be saying , is that they are selling TANZANITE THAT HAS NOT BEEN HEATED BY MAN… But as of writing this, there isn’t a test to tell weather a tanzanite has been heated by man or by the earth, even GIA states on there gem reports that evidence of heating is typically lacking.
Tanzanites come in a variety of colors including , pink, green ,yellow, and a root beer color, its these root beer color stones that are heated to achieve the top color violet/blues and Blue Violets and there are also stones in the rough that come out of the ground already with these beautiful colors, but they to were heated in nature by mother earth.
Hope this helps, if you folks need me to list more info regarding Tanzanites please don’t hesitate to ask.
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