This was the last year that Mercury dimes were struck ... How Much Silver Is in a Mercury Dime? A Mercury dime contains 90 percent silver and 10 percent copper. What Are Mercury Dimes Worth?

Every Barber dime is made of 90% silver, which means it has inherent melt value for the precious metal. Any Barber dime from any year, even in worn condition, tends to be worth at least four dollars.