The 2002 S Mississippi Proof 90% Silver State Quarter is a highly sought-after US coin that features the deep cameo proof finish. Minted in San Francisco, this uncirculated coin is made of 90% silver with a fineness of 0.9. The coin showcases the iconic state quarters design representing Mississippi, making it a valuable addition to any coin collection. Its unique characteristics and historical significance make it a desirable piece for collectors and numismatists alike.