18ct white gold tanzanite diamond oval cut ring rw 0715 tz the tanzanite collection by tivon showcases one of the worlds most desired stones that is considered a thousand times rarer than the diamond this seductive gemstone can exhibit a variety of surreal colours including blues violets and burgundies so each piece is truly unique and beautiful this exquisite and striking ring is a true statement piece that will distract every passer by it boasts a large oval cut tanzanite stone on a class