18K GOLD DIAMOND NATURAL JADEITE NECKLACE. Biggest Jadeite only size 21 mm by 14 mm by 8 mm. Smallest one 10 mm by 18 mm by 8 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 Taiwanese jewelry dealer.