TWO NATURAL JADEITE RING SURFACES. Bigger Jadeite only size 17.8 mm by 11.2 mm by 4.8 mm. Smaller one 17 mm by 10.8 mm by 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 dealer.