To improve it, the heating method is used, in the field of this gem, stones with deep and bold color are the most valuable; But this color can only be seen in stones weighing more than five carats
Tanzanite is a Gemstone with a hardness of 6 to 7 on the Mohs scale and has a range of blue-violet color from light to dark, and blue-purple and pure blue. To improve it, the heating method is used, in the field of this gem, Stones with deep and bold color are the most valuable; But this color can only be seen in stones weighing more than five carats. The weight of the Stone is an important point in the cutting process.
When a Tanzanite gemstone is purchased, the stone should appear completely clear to the eye. Tanzanite has an attractive glassy luster. Flaws that can be seen with the naked eye reduce the value of this stone, except in some very rare cat's eye tanzanites, where the presence of flaws causes the phenomenon of variable brilliance.
Before purchasing a tanzanite gem, it is important to remember that tanzanite measures between 6 and 7 on the Mohs scale and is therefore not a particularly hard stone. As such, tanzanite can be more prone to scratching and damage, and as a result may not be the most suitable stone for everyday ring wear. If you decide to buy tanzanite, use a 10x loupe to check for cut, clarity, and any chips or cracks. It is also recommended to compare a number of stones to measure color and color saturation. By following these short steps, you can better ensure that you end up with a good quality tanzanite specimen.