Tanzanite stone is the latest discovery in the gemstone world, only being discovered in 1967 in Tanzania. Upon its discovery, samples were sent to mineralogists at Harvard University, The British Museum and Heidelberg University.
Scientifically they called in "blue zoisite." But it was not until Tiffany's renamed it as Tanzanite that the stone found its place in the market. In 2002 The American Gem Trade Association added tanzanite to the Modern Birthstone List for the month of December.
Tanzanite stone has a unique quality where the colors purplish blue to a deep blue appears to notice at the same time. These colors have fooled many thinking it's a high quality of sapphire.