Lady's 18K White and Yellow Gold Gregg Ruth Tanzanite & Diamond Bracelet. Bracelet Length: 7 Inches. Contains: 11 Round Brilliant Cut Natural Tanzanites. Weight Approx.: 1.21cttw. 43 Round Brilliant Cut Natural White Diamonds. Color: H-I, Clarity: SI. 66 Round Brilliant Cut Natural Yellow Diamonds. Clarity: SI. Diamond Total Weight Approx: 1.47cttw. A beautiful lady's 18K White and Yellow Gold Diamond Bracelet designed by the much acclaimed New York jewelry designer Gregg Ruth. This bracelet is very versatile and can be used for formal or casual occasions. That is the big thing about Gregg Ruth - it's elegant jewelry for the casual setting.