Precision cut Tanzanite Swarovski Crystals in both round and diamond shapes, 6mm and 4mm in size. Tanzanite what a gorgeous shade, not quite amethyst, not quite mauve, these vibrant earrings suspend a delicate heart pendant and are topped with a Sterling Silver pierced earring wire. The name Swarovski is synonymous with quality. The Austrian company has been manufacturing crystal beads since the 19th century, creating the ultimate in purity and precision in all their products.