Collector & Reseller Glossary

What the jargon actually means — and what it does to resale value. 3,211 terms across 12 categories.

33 terms in Coins & Currency starting with “D” · page 1 of 1

1. date errorCoins & Currency
   A date error refers to a minting mistake where the year inscribed on a coin does not match the actual year the coin was struck. These errors can range from a simple transposition of numbers to a completely incorrect year
2. date varietyCoins & Currency
   A date variety refers to a coin that has been struck with a year different from the standard or most common issue for that specific coin type. These differences can be minor, such as a single digit change, or more signif
3. dealer consignmentCoins & Currency
   This refers to an arrangement where a seller entrusts their collection or specific coins to a professional dealer for sale. Instead of listing items themselves, the seller allows the dealer to market, authenticate, and s
4. dealer grade standardCoins & Currency
   This term refers to a specific, recognized level of coin quality established by professional coin dealers. It signifies a coin that has been handled and circulated but exhibits a generally good state of preservation, mea
5. debasementCoins & Currency
   This refers to the intentional reduction of the precious metal content in a coin while maintaining its face value. Historically, governments would debase currency to stretch their reserves, effectively increasing the mon
6. denominationCoins & Currency
   This refers to the face value printed on a coin, indicating the amount of currency it represents, such as a quarter or a dollar. For collectors and resellers, the denomination is a fundamental identifier, but it is not t
7. denomination errorCoins & Currency
   This refers to a coin being minted with an incorrect face value or design element compared to the standard issue for that year and country. Examples include a coin accidentally struck with a higher or lower number than i
8. design errorCoins & Currency
   A design error refers to a mistake made during the minting process, resulting in a coin that deviates from the intended official design. This can include off-center strikes, doubled dies, incorrect lettering, or unusual
9. diameterCoins & Currency
   This refers to the measurement across the widest part of a coin, usually taken in millimeters or inches. For collectors, the diameter is a fundamental physical characteristic that helps in accurate identification and cat
10. die breakCoins & Currency
    A die break on die break coins is a visible surface flaw caused by stress or fracture in the original minting die, generally reducing collectible value unless it's a documented variety.
11. die crackCoins & Currency
    A die crack is a visible fracture or line that appears on the coin's surface, originating from the die used to strike the metal. These imperfections are not part of the original design but are flaws introduced during the
12. die cracksCoins & Currency
    These are fine lines or fissures that appear on the surface of a coin, caused by stress or imperfections during the striking process. They are a form of mint error and are highly sought after by specialized collectors, a
13. die errorCoins & Currency
    A die error refers to any unintended flaw, imperfection, or anomaly that occurs during the striking process of a coin. These can range from doubled dies, off-center strikes, unusual mint marks, or striking anomalies like
14. die lineCoins & Currency
    A die line refers to the specific pattern or design engraved onto the metal die used to strike a coin. It is essentially the master template that dictates the exact details, lettering, and imagery visible on the finished
15. die polishCoins & Currency
    This refers to a specific, highly desirable surface finish on a coin where the original minting die has been polished to an extremely high sheen. It is not a standard grading term but rather a descriptive feature indicat
16. die polish varietyCoins & Currency
    This refers to a specific manufacturing variation where the coin's surface has been polished or treated in a way that affects the original mint finish. Die polish is essentially a smoothing or refining of the metal surfa
17. die polishingCoins & Currency
    This is a finishing process applied to a coin's striking surface where the metal is meticulously polished to remove any minor imperfections, scratches, or oxidation that occurred during the minting or handling process. I
18. die proofCoins & Currency
    This designation indicates a coin struck using a specialized die that produces an exceptionally high level of detail and a mirror-like finish on the fields, often with frosted devices. Unlike standard mint strikes, die p
19. die rotationCoins & Currency
    This refers to a specific manufacturing characteristic where the die used to strike a coin is rotated during the minting process. Instead of every coin having the exact same orientation of the design elements, some coins
20. die setCoins & Currency
    A die set refers to a collection of the metal molds, or dies, used by mints to strike coins. These are not the coins themselves, but the tools used in the manufacturing process. For serious numismatists and high-end coll
21. die shiftCoins & Currency
    A die shift refers to a noticeable misalignment or change in the striking of the coin's design, where elements appear slightly off-center or shifted from the intended position. This is a manufacturing variation that occu
22. die stateCoins & Currency
    This refers to the condition of the coin's striking, specifically whether the metal flowed perfectly into the die during minting. A "die state" describes the sharpness, detail, and clarity of the design elements. Coins s
23. die state variationCoins & Currency
    This refers to subtle, intentional, or accidental differences in the striking of a coin, meaning the physical impression left by the die used to create it. These variations can include changes in the sharpness of the let
24. die state varietyCoins & Currency
    This refers to subtle, unintentional differences in the striking of a coin, where the die used to create the coin shows a variation from the standard design. These variations can include minor shifts in lettering, unusua
25. die varietyCoins & Currency
    A die variety refers to subtle, unintentional differences in the striking of a coin. These variations can include minor shifts in the design, unusual markings, or slight alterations in the metal flow that occur during th
26. die washCoins & Currency
    This refers to a cleaning process applied to a coin, typically involving washing it to remove surface grime or toning. While some collectors might attempt this to reveal a "fresh" look, it is generally discouraged by num
27. double dieCoins & Currency
    A double die coin is a numismatic variety where the striking process inadvertently caused two dies to strike the same coin simultaneously, resulting in a distinct, often mirrored or overlapping impression on the surface.
28. double strikeCoins & Currency
    A double strike refers to a coin that has been struck twice, or struck with two distinct dies, resulting in an unusual and often highly desirable feature on the coin's surface. This can manifest as an overlapping design
29. doubled dieCoins & Currency
    This refers to a minting error where the die used to strike the coin has produced a secondary, faint impression of the design elements. These doubled features can appear on the obverse or reverse, often manifesting as do
30. doubled die varietyCoins & Currency
    This refers to a specific minting error where the die used to strike the coin has a doubled impression, making the design elements appear blurred or repeated. These are not simply worn coins; they are genuine manufacturi
31. doubled strikeCoins & Currency
    This refers to a minting error where a second, often faint, impression is struck onto the coin after the initial strike. This secondary strike can be caused by a die shifting slightly or an object briefly interfering wit
32. doubled traceCoins & Currency
    This refers to a specific type of minting error where the design elements on a coin appear to have been struck twice, creating a faint, ghost-like repetition of the original image. These errors are highly sought after by
33. doubled trace varietyCoins & Currency
    This refers to a specific minting error where the design elements on a coin appear to have a secondary, faint impression or "trace" of the design superimposed over the main strike. These doubled traces are not simply wea