Coins with a sharp relief and mirrorlike foregrounds (Reverse). Mint proof coins that have a frosted, sculpted background giving them a special reverse cameo effect.90.0% Silver, 10.0% Copper. Block Island National Wildlife Refuge. Wait to pay until you have received your revised invoice. The item "2018-S Silver Reverse Proof America the Beautiful Quarters 40-Coin Roll" is in sale since Saturday, December 22, 2018. This item is in the category "Coins & Paper Money\Coins\ US\Proof Sets". The seller is "wjecharlie2014" and is located in Sioux City, Iowa. This item can be shipped to United States.