Collectors' questions span everything from selling and grading coins to famous U.S. coin designs and Mint policy.

Here's what to do—and not do—when cleaning collected coins. Chalk it up to the excitement of having my own money for the first time, but when I was a kid, I loved cleaning all of the coins collected ...

Collectors ask about silver pricing, coin cleaning, international purchases, and when auction consignment makes sense.

Add Yahoo as a preferred source to see more of our stories on Google. Credit: New Africa/Shutterstock Credit: New Africa/Shutterstock You know those pennies, nickels, dimes, and quarters in your ...

The first rule of coin collecting is: DO NOT CLEAN YOUR COINS. This is the most important piece of advice for any collector, new or old. Serious collectors and experts agree that most coins should ...

According to Donn Pearlman at the Professional Numismatists Guild, there are a few things you should absolutely not do before ...

Thanks for the hint on cleaning coins. However, please tell the folks not to try it with the new "gold" dollars. I tried to clean up a few, and in less than 15 minutes, the cleaner proceeded to remove ...

For many newcomers to the world of numismatics, tarnished coins may appear ugly, dirty, and worth a whole lot of nothing. As we have all learned over the course of our lifetime, appearances are not ...