The product is a 2006 S Silver Proof South Dakota State Quarter, minted in San Francisco. This coin is made of 90% silver with a fineness of 0.9. It features the State Quarters design for South Dakota, making it a unique and collectible piece of US currency. The coin has not been graded or certified, but it is described as uncirculated and visually appealing due to its proof strike type. This silver quarter would be a valuable addition to any coin collection or a great gift for those interested in state-themed coins.