This is a museum quality model Atocha coin as found on the famous shipwreck Nuestra Senora De Atocha of 1622.The coin was casted with a portion of silver recovered from the shipwreck.Bamboo Design Sterling Silver Ring Clad in 14k Yellow Gold Set with Mini RealeRing comes in sizes 5-8, Email me at time of purchase with your sizeIt comes with a certificate of authenticity and a gift pouch Dimensions: approx. 1.2 cm top of ring