Fine 10mm-13mm South Sea Tahitian Gray Pearl Necklace Consign Now DeptJewelrySizeLength Including Pendant 20 in. Fine 10mm-13mm South Sea Tahitian Gray Pearl Necklace, with 18k white gold and diamond pearl drop pendant, 14k white gold and diamond clasp. Length Including Pendant 20 in. Please note that this auction has ended. Click here for an overview of this auction.