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 ...
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AI tools changing the coin collecting game
Coin collecting is getting a high-tech boost as AI-powered tools transform grading, valuation, and sorting. From identifying rare mint errors to cataloging collections, these innovations make ...
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Coin collectors’ guide to grading and care
Coin collecting isn’t just about finding rare pieces—it’s about knowing their true worth and keeping them in top shape. The Sheldon 70-point scale is the gold standard for grading, giving collectors a ...
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