Designed in NYC, Tanzanite International combines the most exquisite craftsmanship with tanzanite of superior quality, with the most extraordinary range of colors and our signature cut. The extraordinary gemstone was first discovered in 1967 at the foothills of Mount Kilimanjaro – the only known source in the world. For decades, skilled engravers in Tanzania have perfected the art of cutting gems to maximize the unique beauty and light of each stone.