Tanzanite is the birthstone of the month of December.
  The name tanzanite was given in honor to the mining area Tanzania, the world's largest tanzanite supplying mine. Tanzanite was also called as the gemstone of the 20th century as it was discovered in 1967 in Africa. The first found tanzanite sources was in Merelani Hills near Arusha, north of Tanzania where the top deep blue variety was found. Tiffany and Co. called the tanzanite a sensation for its exuberant color. The actual ore was named Zoisite. Zoisite was name after the  Czechoslovakian Baron Zois von Edelstein. Further study states that Henry B. Plat, grand son of the president of tiffany for this name Zoisite was very close to the name suicide. Hence the name tanzanite was proposed by Tiffany and Co. The mineral cutting is a challenge at times for gemstone cutters. It is known that the actual mineral has inclusion which are brown to yellow in color which is off the state when compared to the splendid blue color. Any gemstone cutter should plan the cutting accordingly that these inclusion are removed and the maximum is utilized with a neat cut. Most tanzanites are exposed to heat to remove the yellowish component also. Dr. Edward Gubelin in his research found that the fabulous blue tone of tanzanite is due to the presence of vanadium content which is in par with the blue sapphire. Tanzanite is the only stone which is priced for its origin. This is an interesting fact to know as most tanzanites come mainly from Tanzanian mine and is said to be the only confirmed source of origin. However some unconfirmed sources are Kenya and Pakistan but not in par. The Hardness is 6.5 to 7, with a specific gravity of 3.35  and a Refractive Index of 1.69–1.70. Oilpearl has a wide range of tanzanite loose gemstones and also deals with custom jewelry for more than two decades. Please feel free to email us if you have any orders and we most warmly welcome you. We serve certificates from Gubelin, GIA- Gemological Institute of America, AIGS- Asian Institute of Gemological Sciences, Tokyo gem lab, GIT, GRS etc.
  Tanzanite color shades range is incomparable and the shades of blue are varied and to get a better understanding research has classified the tanzanites into 4 grades called blocks. they are a-block, b-block, c-block, d-block which is discussed in detail <>HERE<>

 


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