THREE NATURAL JADEITE RING SURFACES. Jadeite only size 18.5 mm by 12.8 mm by 6.2 mm, 19.5 mm by 14.1 mm by 7.2 mm, 17.2 mm by 12.3 mm by 6 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 dealer.