18K GOLD DIAMOND NATURAL JADEITE NECKLACE. Jadeite only size from 10 mm by 6 mm by 2.5 mm to 9 mm by 5 mm by 2.5 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.