18k Yellow Gold South Sea White, Gold, and Tahitian Grey Pearl Tin Cup Necklace Consign Now DeptJewelrySizeLength 17 in. 10.5mm-9mm South Sea White, Gold, and Tahitian Grey Pearl Tin Cup Necklace, 18k yellow gold chain. Length 17 in. Please note that this auction has ended. Click here for an overview of this auction.