Fine 13mm – 13.9mm White South Sea Pearls Opera Length Necklace Consign Now DeptJewelrySize13mm - 13.9mm Length 34 in. Fine 13mm – 13.9 mm White South Sea Pearls Necklace, opera length, 14k white gold clasp Length 34 in. Please note that this auction has ended. Click here for an overview of this auction.