You may already be familiar with Tanzanite. Mined in one small area near Arusha in Northern Tanzania, it was discovered 50 years ago this year. This pinkish blue gemstone is one of the rarest gemstones on the planet. It is thought to be 1000 times rarer than Diamond. But did you know there are other colors of Tanzanite mined which are even rarer?
Technically known as 'Fancy Zoisite' by gemologists, these unusually-colored Tanzanites make up less than 10% of all Tanzanite mined. This means that they are thought to be around 10,000 times rarer than a diamond.
The fancy color you are most likely to come across is a greenish-blue. Trade names for these extraordinary gems include 'Bi-Colored', 'Chameleon', 'Peacock', or 'Ocean' Tanzanite. You will sometimes find colors that are similar to a peacock feather – a mixture of blues, greens, and purplish-pinks. You may also come across Tanzanites that are much more green than blue.
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Are these colors natural?
Almost all Tanzanite is heat treated. Be extremely wary of anyone who tells you that their Tanzanite is natural, unless they have supporting documentation. However, Fancy Color Tanzanite undergoes the same process as Blue Tanzanite, but comes out a different color. These stones are colored the way they are due to a rare difference in chemical composition, rather than it being linked to heating. Those that show green have more chromium and less vanadium than the majority of Tanzanites. It is possible to find pieces that show a clear distinction between a greener form of Tanzanite and the blue form within one gemstone as a 'split' – but these are exceptionally rare.
Are there other colors?
The most prized Tanzanite of all and those that tend to command the highest prices of all, are those which display yellow, champagne, or pink colors. These are the rarest of all, and are the most highly prized.
Want to Know More? Keep reading...
Find out all your Tanzanite essentials
Find out more about the discovery of Tanzanite
Find out more about how Tanzanite is unearthed
Find out how Tanzanite is graded
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