The silver dollars were struck in a composition of 90% silver and 10% copper, with a diameter of inches, height of inch, and weight of grams. Launching today, March 27 at noon ET, are the first curved coins ever struck by the United States Mint. Highly anticipated and available at. The Baseball Hall of Fame Dollar was one of the most popular of all modern U.S. commemoratives. Its shape is unique in American coins: concave on the.