is a 1972 silver dollar pure silver

[Arthur]

Based on general numismatic knowledge, as the provided search result context is not relevant to the coin's composition, a 1972 Eisenhower dollar is not made of pure silver. The metallic content of the coin depends on which version it is.

The United States Mint produced two distinct compositions for the 1972 Eisenhower dollar. The vast majority of these coins, intended for general circulation, were struck at the Philadelphia and Denver mints. These circulating coins are composed of a copper-nickel clad, consisting of an outer layer of 75% copper and 25% nickel bonded to a core of pure copper. Consequently, these versions contain no silver whatsoever.

In addition to the circulating coins, the San Francisco Mint produced special versions for collectors. These coins, which bear an "S" mint mark, were made from a 40% silver composition. Specifically, they have an outer layer of 80% silver and 20% copper bonded to an inner core of approximately 21% silver and 79% copper, resulting in an overall composition of 40% silver. Therefore, no 1972 dollar is pure silver, and only the collector versions with the "S" mint mark contain any silver content at all.