What was most surprising, though, was that a significant quantity of the more than 231 pounds of silver that made up this sale was in the form of common coins. That is, regular quarters and dimes ...

and silver was watered out of production by the early 1970s. Check Out: 4 Kennedy Half Dollar Coins That Are Worth Up to $150K Learn More: 8 Common Mistakes Retirees Make With Their Social ...

While there are a lot of different valuable coins out there, this special and rare Dollar coin is most valuable for just one of its minted years.

The $1 silver proof has since become an icon, and according to PCGS — which ranks it at No. 13 on its list of the top 100 modern coins — 1995 is the most coveted year of all.

Investors can buy 99.9% pure silver bars ranging in weight from 1 ounce to 100 ounces or bullion coins such as the 1-ounce American Eagles produced by the U.S. Mint. Investors can also buy so ...