The mines are all located in an area of about eight square miles in the Merelani Hills, near the base of Mount Kilimanjaro and the city of Arusha. The darker blueish purple the stone is, the more valuable the stone is and rare to be found. This beautiful stone is surrounded by fine white diamonds and set in 14KT white gold. Find a piece like this with an amazing dark bluish purple tanzanite and be sure to hold on to it. Add this to your collection and make your collection more attractive.The item "Certified Tanzanite 60.00cttw and 1.75cttw Diamond 14KT White Gold Necklace" is in sale since Monday, December 24, 2018. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Necklaces & Pendants\Gemstone". The seller is "gemsandgifts" and is located in Los Angeles, California. This item can be shipped worldwide.