Breathtakingly Beautiful in person, this coin is made from the silver bars recovered from the Atocha & comes with a certificate stating that. The frame is solid sterling silver & an 18kt over sterling silver. The hair of the mermaid is accented with white topaz. At the bottom is an adorable baby turtle with an 18kt gold overlay. Very pretty atocha piece & a great piece of history. Atocha Coin With Mermaid & Turtle Shipwreck Treasure