
Based on the provided information, several types of United States coins contain silver, particularly those minted for circulation in 1964 or earlier. These coins are often referred to as "junk silver" because their value is based on their silver content rather than their numismatic or collectible value.
The most common U.S. silver coins include silver dollars, half dollars, quarters, and dimes. If these coins are dated 1964 or any year prior, they are composed of 90% silver. It is the date that is the primary determinant for the silver content in these widely circulated denominations.
In addition to circulated currency, another category of silver coins is bullion. Silver bullion coins are specifically minted for investment purposes and are not intended for general circulation. Their value is tied directly to the spot price of silver.


