The heating process in Tanzanite

The heating process won't modify the initial colour of Tanzanite. So what does it really do then?

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Gem-related Field

Heating process in Tanzanites
Heating Process in Tanzanites
The heating process has no effect on the initial color of Tanzanite. Only the red/brown axis is removed, leaving the blue/violet hue alone. It should be noted that if the original Tanzanite already has a deep blue hue, the heat will not change its color. Tanzanite's color is primarily determined by the Titanium to Vanadium ratio in its crystal structure.

The heating process of Tanzanite triggers a valence exchange reaction (redox reaction), which improves the purple and blue colors while leaving the titanium colorless. It is difficult to objectively check the nature of Tanzanite treatment, whether naturally or artificially heated. Actually, science has reached its maximum in terms of this matter, it has become even harder to determine these different treatments. However, the final price will not be affected despite the fact that they are heated in different ways.

Tanzanite 17.76 cts

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Benjamin Poudevigne
Social Media Manager at GemMatrix
With over ten years of marketing experience, I finally decided to settle down in Bangkok to work in an area that I have always been interested in: the gemstones industry. I'm still learning how the market works on a daily basis, and I enjoy sharing my experience with those who are interested in learning more about gems in general.