Die cracks are thin, raised lines on a coin's surface that trace the path of a fracture in the steel die. As dies fatigue from striking millions of coins under enormous pressure, stress fractures develop. These cracks fill with metal during each strike, creating raised lines that can range from barely visible hairlines to dramatic fractures spanning the entire coin.
Die cracks are a form of die deterioration — they develop progressively as a die is used. Early strikes from a newly cracked die show fine hairlines, while later strikes show wider, more prominent cracks. Eventually, die cracks can progress to die breaks and cuds if the die continues to be used.
Most minor die cracks carry small premiums at best. Dramatic die cracks with unusual patterns, large cracks spanning the coin, or die cracks on key dates are more collectible. Spider cracks and rim-to-rim cracks attract the most interest.
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Scan Your Coin NowMost minor die cracks add only small premiums. Dramatic, visually striking die cracks — especially large patterns, spider cracks, or cracks on popular coins — can carry moderate premiums.
Die cracks start as fine hairlines and gradually widen with continued use. They can eventually progress to die breaks (raised areas) and cuds (rim breaks) if the die isn't retired.
Many die cracks are visible under magnification but too fine to feel. Larger, more advanced die cracks can sometimes be felt with a fingernail — they are raised above the surface.
A die crack only appears on the side of the coin struck by the cracked die. However, both the obverse and reverse dies can develop cracks independently.