Modern U.S. proof coins are often treated with chemicals to make certain parts of the design take on a frosted appearance, and the fields taking on a mirror finish. Several other methods have been used in the past to achieve this effect, including sand blasting the dies, and matte proofs. Proof coins of the early 1800s even appear to be scratched, but it was part of the production process.

These US Commemorative Prestige sets make excellent gifts, from Anniversaries, Weddings, to Birthdays, Graduations or just a nice thoughtful gesture.