22K Gold & Emerald Shipwreck Ring. 22K gold ring with a deep green cabochon emerald from a 1715 Spanish Galleon fleet that sunk off Florida's East Coast. The emerald measures 6.8mm x 4mm, approximately 0.60 carats, total weight is 3.1g and the ring size is 7.5. Though to have been the property of a priest of royalty, c.1700. Lot includes a Certificate of Authenticity signed by Marine Archeologist James Sinclair.