Numismatic terminology

Numismatics (ancient Greek: νομισματική) is the scientific study of money and its history in all its varied forms. While numismatists are often characterized as studying coins, the discipline also includes the study of banknotes, stock certificates, medals, medallions, and tokens (also referred to as Exonumia).

Sub-fields or related fields of numismatics are:

Exonumia: is the study of coin-like objects such as token coins and medals, and other items used in place of legal currency or for commemoration.
Notaphily: is the study of paper money or banknotes.
Scripophily: is the study and collection of stocks and bonds.

Contents:	A B C D E F G H I J K L M N O P Q R S T U V W X Y Z – Top of page – See also – References – External links

A

Adjustment: The filing down of a blank to the correct weight before striking, shown by file marks.
Alliance coinage: Coins minted by two or more state governments in conjunction.
Alloy: Homogeneous mixture of two or more elements, where the resulting compound has metallic properties.
Altered Date: False date put on a coin to defraud collectors, usually to make it appear more valuable. Usually easily spotted with the aid of a magnifying glass.
Anepigraphic coin: Coin without an inscription.
Annealing: Process of heating and cooling metal in order to relieve stresses.
Assay: Test to ascertain the weight and purity of a coin.
Attribution: Identifier of a coin such as date, mint, or denomination.

B

Bag Mark: Surface mark, or nick, on a coin usually from contact with other coins in a mint bag. More often seen on large gold or silver coins.
Banker's Mark: A small countermark applied to a coin by a bank or a trader indicating that they consider the coin to be genuine and of legal weight. Most often found on ancient and medieval coins, but most commonly on silver coins which circulated in China, where they are referred to as chop-marks.
Base metal: Non-precious metal or alloy containing no gold or silver. Common base metals used in coinage include nickel and copper.
Beading: Raised dot border along the rim of a coin.
Billon: Low-grade alloy of gold or silver with a high percentage of another metal, usually copper.
Bi-metallic: A coin with one type of metal in the center with an outer ring of a different metal. An example is the Canadian "toonie" two-dollar coin.
Blank: Prepared disk of metal on which the coin design will be stamped. Also called a 'planchet'. In practice, 'Blank' is also referred to un-struck side of the coin.
Brass: Copper based alloy with zinc.
Brockage: Originally metal wasted in coin production, now coins struck when the previous coin remained stuck to a die, creating an incuse impression in the next struck coin (primarily found in ancient coins).
Bronze: Copper based alloy with tin.
Bullion: Precious metals (platinum, gold and silver) in the form of bars, ingots or plate, or where quantity is considered as a valuation.
Bullion Value: Current market value of the raw precious metal content of a coin.

Business Strike: A coin intended for everyday use in commerce.

C

Carat: Unit measurement of the weight of precious stones. Usually marked 'c' or 'car'. 1 carat = 200 milligrams. Not to be confused with 'Karat' used with gold.
Cast Coins: Coins produced by pouring metal into a mold. Used for the first Ancient Roman bronze "As" coins and Chinese "cash" coins, but rarely used today.
Centum: One one-hundredth of the basic monetary unit from Latin, English cent, Romance languages centavos, centimos, centesimos or centimes usually one hundredth of a base unit like dollar, euro, peso etc.
Certified Coin: Coin that has been graded and authenticated by one of numerous independent grading services.
Circulated: Term used to indicate a coin that has wear.
Clad Coinage: Issues of coins that contain a center core and outer layer of differing alloys.
Coin alignment: A method of striking in which the obverse and reverse dies are aligned 180 degrees from each other. Most American coins are struck this way.
Collar: Outer ring of the die chamber that holds the blank in place while the obverse and reverse are being stamped.
Contact Marks: Minor abrasions on uncirculated coinage from contact with other coins.
Countermark or Counterstamp: Partial or complete over-stamping of a coin or token in order to change its value or issuing authority, or to display an advertisement, political slogan or symbol, etc. Stamping may consist of a number (value), symbol (authority), letters (advertisement or slogan), or any combination of the above.
Crown: Large coin often struck in precious metal. Modern crowns are usually not highly-circulated. The United States's last crown-sized coin for circulation was the Eisenhower Dollar, last struck in 1978.

D

Debase: To lower the silver/gold value of the coin by altering its purity, but with the same market value as the pure coin.
Denticles: Small toothlike projecting points on the inside edge of coins.
Designer: Artist or creator of a coin's design.
Device: Pattern or emblem used in the design of a coin.
Die: Metal piece engraved with the design used for stamping the coin.
Die Clash: Caused when a blank coin planchet fails to be placed between two dies during the minting process, causing the empty dies to smash together. The design of one or both may impress into the opposite die, causing a "shadow" of the design to appear on subsequent coins minted with the damaged dies. The impact of the two dies may also result in die cracks or defects.
Die Crack: Fine raised line on a coin that was caused by a crack in the die.
Die Defect: Imperfection of various sorts caused by a damaged die. May refer to a crack or clash or a chip out of the die, etc. A defect from a chipped die is called a cud.
Die Variety: Minor alteration in the basic design of a coin throughout its lifespan.
Dipped, Dipping: Chemical cleaning of a coin with a diluted acid. Common in the 1960s and '70's but it was discovered that dipping destroys the surface of the coin, thus dramatically reducing the coin's value.
Double Eagle (U.S.A): United States gold $20 coin.

Example of extreme doubling on the date of a coin

double strike: coin where a die struck, bounced, then struck again, offset from first strike (used for ancient coins where hubs were not used).
Double Die: Die that received two misaligned impressions from a hub; more commonly, a coin struck by such a die.
Doubloon: Popular name of a Spanish gold coin originally valued at 4 dollars.
Dump (Australia): Centre of the holey dollar with a value of fifteen pence.

E

Eagle (U.S.A): United States $10.00 gold coin as well as all bullion pieces made from 1986 through the present.
Edge: Rim of a coin often containing a series of reeds, lettering or other decoration.
Ecu: Large French silver coin made during the end of the monarchy. Also proposed European currency unit.
Effigy: The image or likeness of a person, usually on the obverse of a coin or medal.
Electrotype: Reproduction made by electrodeposition frequently used in museum displays.
Electrum: Naturally or artificially occurring mixture of gold and silver used in some of the world's first coinage.
Elongated coin: An oval medalet produced by a roller die using a coin, token or medal as a planchet, usually a cent.
Encapsulated Coins: Authenticated, graded and preserved in plastic by an independent service.
Engraver: Person who cuts the image of a design onto a die.
Error: Usually a mis-made coin not intended for circulation, but can also refer to an engraving or die-cutting error not discovered until the coins are released to circulation. The mis-made coin errors are usually unique, but the engraving errors appear on all of the coins produced until the error is corrected.
Essai, Essay: A trial strike, also in currency a strike intended to test the design.
Exergue: A segment of the coin design separated by a line (usually indicating the ground in the design) in which a legend is placed/inscribed.

F

Face Value: Value that is written on a coin. For example, an American penny has a face value of 1 cent. A collectable coin or bullion coin is usually worth many times it's face value.
Fantasy: Generally a representation of a rare or never issued coin.
Field: Background area of a coin not used for a design or inscription.
Filler: Coin that is very worn but rare enough for inclusion in a collection.
Fineness: Purity of precious metal content expressed in terms of one thousand parts. 90% is expressed as .900 fine.
Flan: Blank metal piece before striking, also called a planchet or blank.
Fleur de coin (FDC): Coin of exceptionally high quality, where quality is determined not just by wear of the coin in circulation but also by the wear and artistic quality of the dies from which it was minted. These factors are crucial for ancient coinage where variability was higher than in modern mints.

G

Gem: Coin of exceptionally high condition.
Grade: The condition of a coin or amount of wear that a coin has received. Common grade terms used in North America, from worst to best, are About Good (AG), Good (G), Very Good (VG), Fine (F), Very Fine (VF), Extra/Extremely Fine (EF), Almost Uncirculated (AU), Uncirculated (UNC), and Brilliant Uncirculated (BU).

H

Hub: Positive-image punch that impresses the coin's design onto a die.
Holey dollar (Australia): Spanish dollar with a hole in centre, stamped with New South Wales 1813 on obverse and five shilling on reverse.

I

Incuse: Part of the coins design that has been impressed below the surface (intaglio).

Gold ingots from the Bank of Sweden

Ingot: Mass of pure metal from a mould with a certain value and purity.
Inscription: Lettering and wording on a coin.
Intrinsic Value: Current market value of a coin.

K

Karat: Unit measurement of the purity of gold. Usually marked 'K', or 'k'. 24K = pure gold, 18K = .750 fine. Not to be confused with 'Carat' used with precious stones. Note that both originally referred to the seed of the carob tree ('Ceratonia siliqua' or 'Siliqua Graeca'). A Roman coin called the solidus weighed 24 'carats' or 'siliquae', 1/6th of a scruple; this became the standard in purity in western Europe.
Key Coin: Rarest or highest valued coin within a series.

L

Laureate: Head crowned with a laurel wreath.
Legal Tender: Coins or currency which must be accepted in payment of debt.
Legend: Principal inscription on a coin.
Lettered Edge: The outside edge of a coin containing an inscription.
Low Relief: A coin with the raised design not very high above the field.
Luster: Appearance of a coin's ability to reflect light; brilliance.

M

Master die: Original die from which working dies are made.
Medal Alignment: A method of striking coins in which both the obverse and reverse dies are aligned in the same direction. Most Canadian coins are struck this way.
Medal-coin: See also NCLT.
Milled Edge: Raised rim around the outer surface of a coin.

The "3-leg" Mint error was created by polishing a damaged reverse die with an emery stick.

Mint Error: Defective coin produced by a mint.
Mint Luster: Shiny "frost" on the surface of an uncirculated or mint coin.
Mint Mark: Small letter (or other symbol) indicating which mint the coin was struck at.
Mint Roll: Uncirculated coins set wrapped by issuing authority of a certain quantity.
Mint Set: Set of uncirculated coins packaged and sold by the mint.
Mis-strike: Off centre striking of a coin.
Monster Box: Large plastic shipping boxes for silver bullion coins, holding 500 coins. US Silver Eagles are shipped in green monster boxes while Maple Leafs are shipped in red monster boxes.
Motto: Inspirational phrase or wording. Examples include "In God we Trust" on US coins or "Liberte, Egalite, Fraternite" on French coins.
Mule: Coin struck from two dies not intended to be used together.

N

NCLT: Non circulating legal tender. 1 commemorative coins, 2 old coins, 3 rare coins, 4 restricted coins.

O

Obverse: Front or face side of coin.
Overdate: Shown date made by superimposing numbers on a previously dated die.
Over Graded: Coin in worse condition than stated.
Overstrike: Impression with new dies on a previously struck coin.

P

Regular coin, Essai (Pattern) and Piefort

Pattern: The term "pattern" is used in numismatic world, to describe any coin minted from official dies that is not a regular emission, and intended to check or try out new metals, way of design or plan of coinage. Patterns can be divided in three categories:

Pattern: A coin which represents a new design, motto, or denomination, proposed but not adopted, at least for the same year. Most of the unadopted designs fit into this modality.

Die Trials: Coins made with the regular issue dies, in metals other than the proper. Usually minted to verify details of a new coin, value or design.

Experimental Pieces: Very similar process to "Die Trials", but with subtle differences. A coin minted with a die, official or not, to try a new metal, alloy, or shape.

Patina: Surface film caused by oxidation, usually green or brown, mostly found on older silver, copper or bronze coins.
Pedigree: Record of previous owners of a rare coin.
Piefort: A piece struck on a planchet twice or more the normal thickness. The French spelling used in Europe is piedfort.
Planchet: Blank prepared piece of metal on which the coin is struck.
Privy: Small mark, often hidden, on a coin, traditionally to indicate the mintmaster or moneyer.
Proclamation Coins: Coins declared legal tender even though they are not issued by the sovereign, but by another sovereign.

2002 Lincoln cent, Obverse, proof with cameo.

Proof: Coins specially struck for collectors using polished dies and planchets.
Proof Set: Set of proof coins packaged and sold by the mint.
Punch Mark: Coin struck from 'punching' the coin with symbols or seal. Ex: Five Punch Marked coins of ancient India. Punch Marks generally represent animals, tree, hills, and human figures. These coins were issued by royal authority and generally marked with banker's punches on the reverse.

Q

Quarter (U.S.A./Canada): United States or Canada $0.25 coin. Short for Quarter Dollar.
Quarter Eagle (U.S.A): United States gold $2.50 coin.

R

Raw: Coin that has not been encapsulated by any coin grading service.
Reeded Edge: Edge of a coin with grooved lines around the perimeter. Also known as a milled edge.
Relief: Part of the coin's design that is raised above the field.
Re-strike: Coin struck from genuine dies at a date later than the original issue.
Reverse: Back side of the coin. Opposite of 'Obverse'.
Rim: Raised portion of the design along the edge that protects the coin from wear.
Round: Round one ounce silver bullion piece.

S

Series: Set of years coin was minted with a specific design and denomination.
Scruple: One Roman scruple = 1/24 Roman uncia; the modern (nominal) estimate of the weight of the Roman scruple is 1.125 g.
Slab: Plastic case containing a coin that has been graded and encapsulated.
Spanish dollar: Coin issued in Spain and its colonies from 1497 to 1864. Equal to 8 Reals. Also known as a 'Piece of Eight'. It was legal tender in the United States until 1857.
Spot Price: Quoted market value of precious metals in bullion form.
Stainless Steel: A combination of iron, carbon and another element, usually nickel, to prevent rusting.

T

A rare and historic Bechuanaland Border Police canteen token.

Token: Privately-issued piece that has redeemable value for goods or services, but not an official government coin.
Trade Dollar: Silver dollar issued specifically for trade with a foreign country.
Truncation: Sharply cut off bottom edge of a portrait or bust.
Type: Coin's basic distinguishing design.
Type Set: One of each coin of a particular design, series or period.

U

Uncirculated: Coin that has never been used, thus retaining its original luster.
Uniface: A coin struck with the design on one side only.
Union: A proposed United States gold coin worth one hundred dollars. Only one pattern 'half union' is known to exist. Platinum $100 coins are not technically 'unions'.
Unique: Item of which only one is known to exist.
Upset: A coin struck which the obverse and reverse are at different angles to each other.