Tanzanite, the story of one of the most beautiful transformations of the 20th century. In the raw state, it shows itself in the form of a striated prism, with multiple facets. It owes its dominant blue color to a chemical element called vanadium.

Legend has it that one thunderstorm day la lightswide fell on a purple tree from Merelani, burning the savannah of the savannah ofTanzania. The brown zoïsite crystals on the ground were heated to the heart by the flames. Shortly after the Masai people discovered that these stones had become intense blue as if by magic! Later we would give the name oftanzaniteTo this beautiful transformation ...

It is estimated that this stone was formed about 585 million years ago ... but it was not until 1967 that this beautiful blue gem tinged with purple was discovered! This recent find seems all the more extraordinary when you know that there is only one deposit known in the world to date: in Merelani near Arusha in Tanzania. It is in this country of East Africa located on the edge of the Indian Ocean very close to Kilimandjaro, that thetanzaniteSo was born. The Masai people consider it sacred, as well as its particular color, combining the blue of the sapphire and the purple of the amethyst.

Unique and rare at the same time, Tanzanite gradually knew how to make its place in the circle of gems most coveted in jewelry. The Jewelry CraftsmanPhilippe TournaireIn fact integrated it into sublime creations, thus highlighting it. And what a light! A sparkling Tanzanite has this particularity of playing with lighting, revealing to us sometimes its deep blue, its purplish shades or its Bordeaux spikes.

Tanzanite technical sheet

Tanzanite is part of the Zoïsite family (such as Andalusis and Thulite for example). A few decades ago, zoïsites were associated with colors such as pale blue, green, brown, pink ... sometimes even colorless. They were used mainly to make small sculptures. With the arrival of Tanzanite in the family, another use of Zoïsites was born, this stone being cut to facets and gem quality. The tanzanite is a calcium and aluminum silicate, which comes from veins in gneiss. In the raw state, it shows itself in the form of a striated prism, with multiple facets. It owes its dominant blue color to a chemical element called vanadium. Its hardness is between 6 and 7, which requires lapidaries to cut it very carefully to keep as much material as possible while revealing the most beautiful colors. Without human intervention, Tanzanite Has brown shades.

It is common and admitted that most Tanzanites are the subject of embellishment by heating, which makes it possible to reveal their intense blue shine.

This is how brown notes are very attenuated or disappear. This process gives us the opportunity to contemplate the gem in all its splendor, because we can see different colors in a very distinct way in the same crystal, according to the angle of view (this phenomenon is called the pleochroism). Thus, since this or that position, Tanzanite can show us its most beautiful blue, or its shades pronounced with purple, purple ...

ThetanzanitesThe most popular in the trade being those of a very lively blue or a very intense lavender blue-violace. There are imitations of this beautiful stone, given its certainly fluctuating but growing success in the end. As it comes from a single source in the world, the offer is not always in line with demand. As a result, in the late 1990s, imitations appeared. We then find false tanzanites at reasonable prices ... These are glass imitations, doublets with synthetic stones (such as synthetic fosterite).

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