Few travelers arrive in Tanzania without having heard the magic word TANZANITE. It’s a one – of – a kind gemstone found in the Masai country of Tanzania, right in the sight of Mount Kilimanjaro. By Late 1967, Manuel De Souza, the discoverer of the Tanzanite deposit, knew that his initial identification as the mineral olivine was incorrect but dumortierite, his second guess, was also wrong. By nature, tanzanite is trichroic, meaning that it shows different colors, depending on the direction in which it is viewed.