heritage auctions

Coin Weights and Requirements under US Law – 31 U.S. Code § 5112

31 U.S. Code § 5112 - Denominations, specifications, and design of coins (a) The Secretary of the Treasury may mint and issue only the following coins: (1) a dollar coin that is 1.043 inches in diameter. (2) a half…
how are coins graded

Coin Grading Scales and How are Coins Graded

Grading Scales Since rare coin quality varies widely, numismatists have adopted several coin-grading methods to assign more specific levels of quality to rare coins. The overwhelmingly popular method to use is the American Numismatic Association (ANA) grading scale. The…
clad coins

What are Clad Coins?

The half dollar, quarter dollar, and dime coins are clad coins with 3 layers of metal. The 2 identical outer layers are an alloy of 75 percent copper and 25 percent nickel. The inner layer is copper. The outer…