Glossary
Error Coin
An error coin shows a mistake from the minting process-wrong planchet, misstrike, die issue, or other anomaly-distinct from damage that …
Numismatics Coin FAQ
A collecting-focused glossary for coin terms, minting vocabulary, and evaluation basics.
Glossary
Patina
Patina is a broader term for the surface appearance that develops over time, especially on copper and bronze. It can signal age, …
Glossary
Face Value
Face value is the denomination shown on a coin (like 1 cent or 1 dollar). It’s the legal tender value, often far below a collectible …
Glossary
Cud
A cud is a blob-like raised area on a coin caused by a piece of the die breaking away near the rim, leaving a void that fills with metal …
Glossary
Rim Damage
Rim damage includes dents, nicks, filing, or flattening on the rim. Because the rim protects the design, rim problems are heavily weighed by …
Glossary
Strike
Strike describes the act and quality of imprinting the design onto a planchet using dies. Strike strength affects how sharp the details look …
Glossary
Slab
A slab is the sealed plastic holder used by third-party grading services. It protects the coin, displays the grade, and adds a layer of …
Glossary
Grading
Grading is the process of evaluating a coin’s condition using factors like wear, luster, strike, marks, and eye appeal. Grade strongly …
Glossary
Privy Mark
A privy mark is a small, intentional symbol added to a coin’s design-often to commemorate an event, security feature, or special …
Glossary
Bullion
Bullion coins are valued primarily for their precious-metal content (gold, silver, platinum), though some bullion issues also carry …