Tanzanite is part of the family of zone (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 mainly used 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. There 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 reveals 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, depending on 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 ...

THEtanzanites The most popular in the trade are 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 fosteritis).