Diamonds By The Inch - 18K white gold 5 station diamond necklace, adjustable length 16 - 18". D = 0.23 ctw. Most Roberto Coin items are available in yellow gold, white gold, and rose gold. Bracelets and rings are available in additional sizes. Please contact a member of the Forsythe team to check to see if we have the item in-stock or available by special order.