A dollar coin may be a dollar coin, but a silver dollar, that is a whole different story. It may be worth going through your jar of change.

but the first silver dollar struck by the U.S. mint one year earlier is one of the rarest and most valuable of all U.S. coins, period. This “national treasure” sold for more than $10 million ...

The Kennedy half dollar was ... comprised of 90% silver — was only issued in 1964. Therefore, it seems fitting that most of the rarest and most valuable examples of this coin come from that ...