18K GOLD DIAMOND NATURAL JADEITE NECKLACE. Biggest Jadeite only size 6.5 mm. Smallest 5 mm. T. 3 mm. Guarantee Natural Jadeite. GIA certificate is available upon buyer's request and cost. If fail to acquire GIA certificate, Consignor guarantee to refund. From a Hong Kong jewelry Company. No shipping fee. Shipped under fully insurance coverage.