A 0.68 carat oval blue tanzanite with 0.69 carats of round white zircon in 18K yellow gold over sterling silver ring measuring approximately 0.43 inches long by 0.87 inches wide - the tanzanite ring where the gemstone and the zircon accent are nearly equal in carat weight, creating a balanced sparkle-and-color composition. Tanzanite's characteristic blue-violet color shift creates a dynamic center stone. Not sizeable.