Things You'll Need
Instructions
Look at the date. Any U.S. silver dollars (or even half dollars and dimes) minted before 1964 are silver. From 1964 onward, they are often made of copper-nickel clad. Even the coins containing silver after 1964 are only 40% silver.
Stick a magnet to the coin. Some coins can look like silver, copper, or gold, but actually be steel. If the magnet lifts it up, then it̵7;s steel.
Measure the coin̵7;s diameter and compare its size with similar authentic coins. If the size varies, then it̵7;s either a rare variant or (most likely) a forgery. The diameter of Eisenhower dollars are 38.1 mm, and the rarer Morgan dollars are 31.1 mm.
Weigh the coin. Real silver coins are always heavier than their copper-nickel clad variants. For example, the silver-clad Eisenhower dollar weighs 24.59 grams, while the CuNi-clad Eisenhower weighs 22.68 grams. Any Morgan dollar that doesn't weigh 31.1 mm is not a true, silver, Morgan dollar.
Look closely at the coin̵7;s details, and have a magnifying glass handy. Most counterfeits will differ in small details, and legal copies that aren̵7;t real silver coin but legally ̶0;counterfeited̶1; will have COPY or the letter ̶0;R̶1; somewhere on the coin to differentiate them from the real coins.