(CN) - A coin collector who invented an "eye appeal" grading method can sue companies that he says broke their deal not to use his ideas as their own, a federal judge ruled. Duane Blake, attorney and ...

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 ...

Global coin markets are thriving, with major international auctions and expos underscoring how worldwide demand increasingly ...