Coin grading is the process by which a certified numismatist determines the grade, or physical condition, of an existing coin. Once the grade is determined, the value of the coin can then be ...

GRAND RAPIDS, MI - A Grand Rapids-based inventor has developed a first-of-its-kind device designed to transform how collectors grade and value their coins. The OCS200, created by Richard Colonna of ...

Think your old coins might be valuable? Learn how experts identify rare and collectible coins — and what makes them worth serious money.

CoinKnow is the best coin identifier app right now for U.S. coin collectors. Snap a photo, get a Sheldon Scale grade within 2 points, automatic error detection, and market pricing from real ...

MANILA, Philippines — The Professional Coin Grading Service (PCGS), an authentication and grading company for high-value collectibles, joined the Minted MNL Summer Show and Auction held earlier this ...