For almost two millennia it was believed that Diamond was indeed the rarest of all the gems found on this god blessed planet of ours. Until one fine Tanzanian afternoon, a Masaai tribesman found a blue-violet crystal and showed his little discovery to Manuel de Souza a tailor by profession and prospector by passion, who was in the Mount Kilimanjaro region in search of Rubies. It was at first concluded that the stones were unusually vibrant sapphires, but later testing by the Gemological Institute of America (GIA), Harvard University, The British Museum and Heidelberg University identified it as a variant of mineral zoisite. Such is the story of the rarest of rare gemstone on Earth-The Tanzanite.
Blue Zoisite or Tanzanite Birthstone was discovered in the foothills of Mount Kilimanjaro in Tanzania. Tanzanite was given its commercial name by the Tiffany & Co. of New York in 1968 as part of its 175th anniversary celebration, the name is said to represent the stones country of birth Tanzania. Tanzanite is a gemstone that is beyond rare, its supply will last only another 30 years and as time passes its rarity keeps on increasing. It is found in only one place on Earth in the foothills of Mount Kilimanjaro and intense geological research has shown that its possibility of being found outside its current site of mining is one in a million. Therefore, its extent of rarity both geologically and geologically is thousand times more than that of Diamonds.
This blue-violet stone is known for its remarkable trichroism that allows it to appear in three alternate colors of blue sapphire, violet and burgundy depending on crystal orientation. The world’s largest faceted tanzanite is 737.81 carats and one of the famous large tanzanite is the ‘Queen of Kilimanjaro’. Recently at the mines in Tanzania, a tanzanite weighing over 3.4 KG or 16, 839 carats was found.