2012 United States Quarters America the Beautiful Silver Proof Set - 5 pc set Grades. Seven of the 14 coins in the set – the dime, half–dollar and the five quarter–dollar coins – are all struck in lustrous 90 percent silver, commonly referred to as “coin silver.” The 2012 United States Mint Silver Proof Set includes America the Beautiful Quarters® coins honoring El Yunque National Forest (Puerto Rico), Chaco Culture National Historical Park (New Mexico), Acadia National Park (Maine), Hawai’i Volcanoes National Park (Hawaii) and Denali National Park and Preserve (Alaska). The set also includes Presidential $1 Coins honoring Presidents Chester Arthur, Grover Cleveland – first and second terms – and Benjamin Harrison; one Native American $1 Coin; one Kennedy half–dollar; one Jefferson 5–cent coin; one Roosevelt dime; and one Lincoln one–cent coin. Over 0.75oz Of Pur SIlver