Tanzanite is an extraordinary gemstone, defined as much by its rarity as its beauty. Its kaleidoscopic blue and purple tones are mesmerising and make it a greatly sought after gem. It was first discovered and identified as recently as 1967 and is found in only one place in the entire globe: the foothills of Mount Kilimanjaro in eastern Africa. It is said that these deposits will run dry within the next thirty years, making it a thousand times rarer then diamond. Tanzanite is believed to be a powerful gemstone able to boost energy and vitality, to develop spirituality and stimulate psychic communication.
What is Tanzanite?
Tanzanite is a crystalline gemstone. It is a variety of the mineral zoisite, which is generally a relatively abundant mineral; nevertheless the additional presence of the chemical element vanadium, together with unique geological conditions, make Tanzanite an extremely rare gem.
Tanzanite’s mesmerizing colours
It is admired for its lush blue velvet to rich royal purple tones, often compared to those of sapphires. In its rough state Tanaznite is usually reddish-brown and requires an artificial high temperature treatment to bring to light the stone’s blue-violet colours.
It is marvelled at for its strong trichroism, this means that the gem radiates three different mesmerizing colours depending on the crystal’s orientation (its crystal axes) and lighting conditions. Once cut and polished, all Tanzanite gemstones will be blue, violet and bronze; the intensity of these colours will change according to the lighting.
Rarely, Tanzanite stones of a green colour are also found; these are especially valued by collectors as extremely unusual.