Tanzanite is a rare gemstone, even very rare, since only one deposit is known in the world.
The only known mine in the world is located in Tanzania, at the foot of Kilimanjaro, near Arusha.
Tanzanite is a thousand times rarer than diamonds, and fascinates with its purplish-blue reflections and unusual brilliance.
Tanzanite is the blue-violet variety of a mineral called zoite, first discovered in 1969. It was quickly named "Tanzanite" after the country of its birth by Tiffany & Co. of New York who introduced it to the United States. It was an immediate success!
Its violet-blue colors often have a depth comparable to the finest sapphires.
The most prized tanzanites on the market are those of a very vivid blue or a very intense violet-blue to lavender.
Without human intervention, tanzanite has brown hues. It is common and accepted that most tanzanite is heated.
Tanzanite has a hardness of 6.5 / 7 on the Mohs scale.