You are looking at a gorgeous solid 925 sterling silver necklace with an authentic US 1940 Mercury Dimes 90% silver XF/AU coin. The coin is set with backside 4-prong, and you can see both sides of the coin. The pendant is made of solid 925 sterling silver, sized about 29mm(1.16″) x 23mm(0.92″). It comes with a 18″ solid 925 sterling silver chain, and also a gift box. I hope you end up with one of these beautiful silver coin necklaces. This necklace will be great for gift, investment purpose or just adding to your coin/jewelry collection. I do have a BLANK coin bezel for sell in my store if you want use your own coin. All copyrights reserved. Let me know if you have any question. Both chain and pendant are marked 925 sterling silver. Thanks!