Tanzanite Crystals & Gemstones from Arusha / Tanzania, Africa. Here you will find a very nice range of specially selected Natural / Untreated Tanzanite crystals at VERY competitive prices, as well as a range of faceted Tanzanite Gems. Feel free to shop around online and I think you will quickly come back with a smile. Metephysically,Tanzanite is considered THE stone for connecting the Heart & Third Eye. Tanzanite is also one of the birthstones for December. This beautiful stone is 1000 x rarer than diamonds and there has been a very steady price increase over the last couple of years.