This classic princess necklace features cluster of tanzanite casting a spell of leafy enchantment. Tanzanite is a blue-violet variety of the mineral zoisite and is a thousand times rarer than diamonds. Its colors vary from deep, dark royal blue with flashes of red to light cornflower or periwinkle blue. The gem is considered December's birthstone. Accented with white zircons for sparkling beauty, the 18-inch necklace is made in platinum over sterling silver. Features spring lock for easy wearing.