TWO NATURAL JADEITE RING SURFACES. Bigger Jadeite only size 13.3 mm by 10.7 mm by 3.3 mm. Smaller one 11.7 mm by 10.2 mm by 4.7 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.