Sample of Tanzanite Gem in a Ring
Tanzanite Rings
One of kind extraordinary gemstone. A rare of a kind that you can see in only one place worldwide. It is blue, surrounded by a fine hint of purple, an exotic color.
Tanzanite is named after the East African state of Tanzania, the only place in the world where it can be found. Why in Africa? It is because Africa is a continent which provides the world with numerous and magnificent gemstones, like for example tanzanite and other gemstones that includes the diamonds. During the discovery in 1967, it was introduce by the specialists as the 'gemstone of the 20th century'. They held their breath in excitement as they caught sight of the first deep-blue crystals which had been found in the Merelani Hills near Arusha in the north of Tanzania. Millions of years ago, metamorphic schists, gneisses and quartzite's formed impressive, flat-topped monadnock on a vast plain in Kilimanjaro. This precious crystals grow on, deposits on the inside of these unusual elevations. For a long, long time they were hidden from the man's eye, until one day some passing Masai shepherds noticed some sparkling crystals lying in the sun and took them along with them.
Tanzanite is named after the East African state of Tanzania, the only place in the world where it can be found. Why in Africa? It is because Africa is a continent which provides the world with numerous and magnificent gemstones, like for example tanzanite and other gemstones that includes the diamonds. During the discovery in 1967, it was introduce by the specialists as the 'gemstone of the 20th century'. They held their breath in excitement as they caught sight of the first deep-blue crystals which had been found in the Merelani Hills near Arusha in the north of Tanzania. Millions of years ago, metamorphic schists, gneisses and quartzite's formed impressive, flat-topped monadnock on a vast plain in Kilimanjaro. This precious crystals grow on, deposits on the inside of these unusual elevations. For a long, long time they were hidden from the man's eye, until one day some passing Masai shepherds noticed some sparkling crystals lying in the sun and took them along with them.
It is a blue variety of the gemstone zoisite that consists of calcium aluminium silicate and not particularly hard, with a value of 6.5 to 7 on the Mohs scale. The reason why it should always be worn carefully and never placed in an ultrasonic bath for cleaning or brought into contact with acids. The tanzanite deep blue color of is excellent, and runs from ultramarine blue to light violet-blue. The most color is a blue surrounded by a delicate something purple-like color, which has a particularly wonderful effect in sizes of over 10 carats. The well developed polychromaticity of the tanzanite is typical: depending on the angle from which you look at it, the stone may appear blue, purple or brownish-yellow. Having said that, most raw crystals are somewhat spoiled by a brownish-yellow component, though it can be made to disappear by the cutter if he heats the stone carefully in an oven to approximately 500°. During the procedure he must pay careful attention to the moment at which the colour turns to blue. This burning is a method of treatment which is regarded as customary in the trade, but the raw stones must be as free of inclusions as possible, since otherwise fissures may occur. In fact working with tanzanite can sometimes give even the most experienced cutter a bit of a headache, the cleavage of this gemstone being very pronounced in one direction. This exclusive gemstone is cut in every imaginable shape from the classical round shape to a number of imaginative designer cuts.
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