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Tsavorite

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	Topics Tsavorite Topic Home Tsavorite or tsavolite is a variety of the garnetGarnet The garnet group of minerals show crystals with a habit of rhombic dodecahedrons and trapezohedrons.... group species grossularGrossular Grossular is a pale green, pink, brown, or black garnet, Ca3All23, occurring alone or as a constituent of the common garnet.... , a calciumCalcium Calcium is the chemical element in the periodic table that has the symbol Ca and atomic number 20.... -aluminiumAluminium Aluminium or aluminum is the chemical element in the periodic table that has the symbol Al and atomic number 13... garnet with the formula CaCalcium Calcium is the chemical element in the periodic table that has the symbol Ca and atomic number 20.... ₃Al₂SiSilicon Silicon is the chemical element in the periodic table that has the symbol Si and atomic number 14.... ₃OOxygen Overview Oxygen is a chemical element with the chemical symbol O and atomic number 8.... ₁₂. Trace amounts of vanadiumVanadium Vanadium is a chemical element in the periodic table that has the symbol V and atomic number 23.... or chromiumChromium Chromium is a chemical element in the periodic table that has the symbol Cr and atomic number 24. ... provide the green color. Green grossular had been rare until 1967, when British gem prospector and geologist Campbell R. Bridges came across a deposit of the mineral in the mountains of north-east TanzaniaTanzania Tanzania , officially the United Republic of Tanzania , is a country on the east coast of Africa.... . The specimens he found were of very intense color and of high transparency. The find interested the gem trade, and attempts were made to export the stones, but the Tanzanian government did not provide permits. Believing that the deposit was a part of a larger geological structure extending possibly into KenyaKenya The Republic of Kenya is a country in Eastern Africa.... , Bridges began prospecting in that nation. He was successful a second time in 1971, when he found the mineral variety there,and was granted a permit to mine the deposit. Until 1974, the gemstone was only known to mineral specialists; in that year Tiffany and Co launched a marketing campaign which brought broader recognition of the stone. The name tsavorite was proposed by Tiffany and Co president Henry Platt in honor of Tsavo National Park in KenyaKenya The Republic of Kenya is a country in Eastern Africa.... . Apart from the source locality in TanzaniaTanzania Tanzania , officially the United Republic of Tanzania , is a country on the east coast of Africa.... it is also found in ToliaraToliara Toliara is a town in Madagascar. It is the largest city and capital of the Toliara province.... (Tuléar) Province, MadagascarMadagascar Madagascar, , is an island nation in the Indian Ocean, off the eastern coast of Africa, close to Mozambique.... , but so far, no other occurrences of gem material have been discovered. Rare in clean gems over 1 caratCarat (mass) The carat is a unit of mass used for gems, and equals 200 milligrams or 3.086 grains .... (200 mg) in weight, tsavorite has been found in sizes yielding up to 15 carat (3 g) stones. Recently, a gem quality tsavorite likely to be the largest ever discovered, over 325 carats (65 g), became available in Thailand (see "Multicolour.com" external link below). External links