18K GOLD DIAMOND NATURAL JADEITE NECKLACE. Jadeite only size 17 mm by 7 mm by 4.5 mm and 15 mm by 7 mm by 3.5 mm and 22 mm by 8 mm by 3.2 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.