Coin Vault
Explore mintages, history, grading, glossary terms, and error coin guides by denomination.
Pennies
Research penny mintages, history, grading, glossary terms, error coins, and more.
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Research nickel mintages, history, grading, glossary terms, error coins, and more.
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Research dime mintages, history, grading, glossary terms, error coins, and more.
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Coin Collecting Glossary (Numismatic Terms)
New to coin collecting or brushing up on the basics? Our Coin Nerds Glossary explains common coin terms in simple, collector-friendly language. From BU and mint marks to luster, obverse, reverse, and more, this is the place to build your knowledge one term at a time.
What Coin Grading Means
Coin grading is the process of judging a coin’s condition based on wear, detail, luster, marks, and overall eye appeal. In general, the better the grade, the stronger the value and collector demand.
Poor to Good (PO-1 to G-6)
Coins in this range show heavy wear and have lost much of their original detail. Major design elements are still visible, but the coin is well worn from circulation.
Very Good to Fine (VG-8 to F-15)
These coins show moderate wear but still retain more visible detail than lower-grade examples. Main features are clear, and the coin is often more attractive to collectors filling albums or sets.
Very Fine to About Uncirculated (VF-20 to AU-58)
Coins in this range keep strong detail and show lighter wear, mostly on the highest points of the design. About Uncirculated coins may look nearly new at first glance, with only slight friction from handling.
Mint State Coins (MS-60 to MS-70)
Mint State coins show no wear from circulation. These coins are uncirculated and are graded based on luster, marks, strike quality, and overall eye appeal.
Proof Coins
Proof coins are specially made using polished dies and planchets for a sharper, more detailed appearance. They are struck for collectors and are different from standard business-strike coins made for circulation.
Red, Red-Brown, and Brown
Copper coins are often described by color as Red, Red-Brown, or Brown. These designations help collectors understand how much original mint color remains, which can greatly affect desirability and value.