7/8 ct Oval-Cut Tanzanite Pendant By Kari - August 12, 2015 687 Use $10 Off Coupon Code: SALE For a radiant twist to your look, opt for this tanzanite pendant. A 7/8 ct oval-cut tanzanite is set in sterling silver. Piece measures 3/8 by 3/16 inches. Comes with a sterling silver 18-inch cable chain.