The 2010-S Proof Grand Canyon Quarter is the fourth design issued in the America the Beautiful Quarters Program. The 2010-S Proof Grand Canyon Quarter was initially sold in a 2010 America the Beautiful Quarters (5 Piece) Proof Set. Later in the year, it was also issued in a separate 2010 (14 Coin) Proof Set. (Read about the different Proof Sets below...)
2010 America the Beautiful (5 Coin) Proof Set: The 2010 (5 Coin) Proof Set was first sold by the U.S. Mint on May 13, 2010 at 12:00 Noon (ET). Each set had a price of $14.95 each. Each set contained all five different designs of the 2010 America the Beautiful Quarters.
2010 (14 Coin) Proof Set: The 2010 Proof Set was first sold by the U.S. Mint on July 22, 2010 at 12:00 Noon (ET). Each set had a price of $31.95 each.
Each set contained a Lincoln cent, Jefferson Nickel, Roosevelt Dime, Kennedy Half Dollar, Native American Half Dollar, the five America the Beautiful Quarters and four Presidential Dollars all Proof and from the year 2010.
All Proof coins in the set were struck on specially prepared blanks which are polished and cleaned prior to striking. This gives the coins strong mirror like surfaces and a deep cameo appearance. The blanks were then struck by polished dies at least twice to produce a sharp relief.