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Every term a collector meets on a listing, a slab label, or a population report, defined in plain language. Terms link to the collections and guides where you can see them in practice.

Antiqued
A finish that gives struck silver a deliberate aged patina, settling into the recesses of the design so the piece reads as an artifact. The patina is part of the finish, not tarnish. See the antiqued collection.
Assay
The testing of a metal's content and purity. Some issues ship with an assay certificate documenting the verified fineness of the piece.
Attribution
The grading service's identification of exactly which issue and variety a piece is, recorded on the slab label along with the grade.
Bullion
Precious metal products valued primarily by weight and purity rather than design, edition, or grade. The pieces in this catalog are collectible numismatic items, a different category: their value drivers are license, mintage, and certification, not metal weight alone.
Burnished
A finish produced by polishing the blanks before striking, giving a soft, satiny uncirculated surface distinct from both proof and standard mint state.
Business Strike
A coin struck at normal production speed for circulation or standard release, as opposed to the slower, specially prepared proof process. Graded on the MS scale.
Cameo and Ultra Cameo
Grading designations for the contrast between a proof coin's mirrored fields and frosted design elements. Ultra Cameo marks the strongest contrast. Appears on the slab label after the grade.
Census
Another word for the population report: the grading service's running count of examples graded at each level. See Population Reports and Finest Known.
Certificate Number
The unique number on a slab label. Enter it on the grading service's verification page to confirm the piece and see its current population. See How to Read a Slab Label.
Certificate of Authenticity (COA)
A document issued by the mint or producer stating a piece's specifications and edition. Useful provenance, but distinct from independent third party grading.
Chibi
A Japanese derived art style drawing characters small and exaggerated. Chibi coins are shaped, colorized silver pieces in that style, one of the most collected formats in licensed coinage.
Clad
A layered composition where an outer metal is bonded over a different core, common in circulating coinage. Collector silver in this catalog is solid fine metal unless a listing states otherwise.
Coin and Medallic Alignment
How the two faces are oriented to each other. Coin alignment flips top to bottom when you rotate the piece; medallic alignment keeps both faces upright, as on most medals.
Colorized
A finish where pigment is applied to struck silver by pad printing or digital techniques, reproducing character art, posters, and comic covers. See the colorized collection.
Commemorative
An issue struck to mark an event, anniversary, or figure. Most modern licensed coinage is commemorative in nature: an authorized celebration in legal tender form.
Crossover
Resubmitting a certified piece to a different grading service in its holder. Crossovers move examples between the services' population reports, one reason census counts shift.
Deep Cameo
PCGS's designation for the strongest proof contrast, equivalent in spirit to NGC's Ultra Cameo. The wording differs by service; the frost is the same idea.
Denomination
The face value an issuing nation assigns a legal tender coin. On collector coins it is symbolic: a $2 Niue issue trades on its silver, license, mintage, and grade, not its two dollars.
Details Grade
A grade noting the piece is genuine but has a condition issue such as cleaning or a scratch, stated on the label in place of a straight numeric grade.
Device
A raised design element on a coin: the portrait, the character, the emblem. Devices sit on the field and carry the frost on proof strikes.
Die
The hardened steel tool that impresses the design into the blank. Every coin is struck by a die pair, one for each face, and die preparation is where finishes like proof begin.
Early Releases
A grading designation for coins certified within a defined window after release. Parallel to First Releases; the wording differs by program. See Early Releases certified coins.
Edge
The third side of a coin. It may be reeded with fine grooves, plain, lettered, or decorated, and it is part of what graders examine.
Effigy
The formal portrait on a coin's obverse. On Commonwealth issuer coins from nations such as Niue and Tuvalu, the reigning monarch's effigy marks the piece as legal tender.
Encapsulation
The sealing of a certified piece in its tamper evident holder after grading. Encapsulation is what lets a grade travel with the coin.
EPQ
Exceptional Paper Quality, PMG's designation for notes it determines to have original paper that has not been physically, chemically, or materially processed. See PMG graded notes.
Field
The flat background of a coin's surface, surrounding the raised devices. On proofs the field carries the mirror polish.
Fineness
Metal purity expressed as a decimal: .999 is 99.9 percent pure silver, .9999 finer still. Stated on the coin or its documentation and verified at grading. See .999 fine collectibles.
Finest Known
A certified example with no example graded higher in the service's population report. Among certified examples there is, by definition, nothing finer. The scarcest are tracked in the Rarity Register.
First Day of Issue
The strictest early grading designation: coins documented as received for grading on the first day of an issue's release. See First Day of Issue coins.
First Releases
A grading designation for coins submitted within an early window after an issue goes on sale, documented on the label. See First Releases certified coins.
First Strike
PCGS's designation for coins submitted within an early window after release, the counterpart of NGC's First Releases.
Foil Note
A collectible struck or formed as a thin silver or gold foil in banknote format, often colorized and graded by services such as CGC on a 10 point scale.
Frost and Frost Break
The matte, snowy texture on a proof coin's devices. A frost break is a spot where the frost is disturbed, and strong unbroken frost is what earns Cameo and Ultra Cameo designations.
Gilded
A finish applying gold selectively to elements of a silver coin's design. Fineness varies by issue and is stated where the producer documents it. See the gilded collection.
Grade
An independent service's assessment of a piece's condition, expressed on a 70 point scale for coins and notes (10 point for CGC collectibles). See Grading 101.
Hairlines
Fine parallel lines on a coin's surface, usually from wiping or cleaning. They matter because they separate high grades from perfect ones.
High Relief
A striking style where the design rises well above the coin's surface, requiring prepared dies and higher pressure. See the high relief collection.
Hologram
A light diffracting foil element used on notes and some coins, both as a security feature and a visual effect. The gold infused notes in this catalog carry holographic foil layers.
Incuse
A design sunk below the coin's surface rather than raised above it, the reverse of normal relief. A distinctive, less common striking style.
Intaglio
An engraved printing method that leaves raised ink you can feel, used on genuine banknotes and on currency grade collectible notes.
Issuer
The nation whose legal tender a coin is. The issuer authorizes the denomination; a separate producer usually strikes the coin. Niue, Tuvalu, and Cook Islands are the field's best known issuers.
Currency status granted by an issuing nation. Legal tender status is what distinguishes a coin from a privately produced medal or round, though the face value on collector coins is symbolic.
Legend
The inscription running around a coin's periphery: the issuer's name, the denomination, the year, and on licensed issues often the program title.
License
Authorization from a rights holder to use a franchise, character, or artwork on a collectible. The license is what separates an official piece from a themed tribute. See Licensed, Themed, or Just a Coin.
Luster
The sheen created by metal flow during striking. Original, unbroken luster is central to mint state grading, and it cannot be restored once disturbed.
Micro-engraving
Engraved detail fine enough to require magnification, used by some mints as a security feature and a demonstration of craft.
Mint (Producer)
The company or institution that physically strikes a coin, from national mints like the Royal Canadian Mint to specialist producers like the New Zealand Mint. Distinct from the issuer.
Mint Mark
A small letter or symbol identifying the facility that struck a coin. Central to classic collecting; less common on modern licensed issues, where the producer is named instead.
Mint State (MS)
A standard production strike with no wear, graded MS on the 70 point scale. Distinct from proof, which is a special striking method.
Mintage
The number of examples of an issue the mint struck: the hard ceiling on supply. Browse by edition size from mintage 100 or fewer upward, or see the Rarity Register.
Mintage Tier
Our catalog's grouping of editions by size, from 100 or fewer to open editions, so scarcity can be browsed directly. See the Two-Number Rule for how to read it.
Mule
A coin struck with a mismatched die pair never intended to appear together. A famous class of mint error, and highly collected when genuine.
Numismatics
The study and collecting of coins, currency, and related objects. A collector of coins is a numismatist, and modern licensed coinage is one of numismatics' youngest branches.
Obverse
The front face of a coin, traditionally carrying the effigy or primary device. On licensed issues from Commonwealth issuers, usually the monarch's portrait.
Offset Printing
A banknote printing method laying smooth, precise background color, used together with intaglio on currency grade collectible notes.
Open Edition (Mint to Demand)
An issue struck to meet demand during a sales window rather than to a fixed mintage. The final figure is set when the window closes.
Pad Printing
A technique that transfers ink from an etched plate to a coin's surface via a silicone pad, the workhorse method behind colorized coins.
Patina
Surface tone on metal, whether developed naturally over time or applied deliberately as an antiqued finish. On antiqued issues the patina is intentional and part of the design.
Piedfort
A coin struck on a blank of double the standard thickness, an old French presentation tradition revived for premium modern issues.
Planchet (Blank, Flan)
The prepared disc of metal a coin is struck from. Proof planchets are polished before striking; shaped coins begin as custom cut planchets.
Population
The count of examples a grading service has certified at each grade level. Counts graded examples only, so it grows over time. The second number in the Two-Number Rule.
Presentation Case
The mint's original box or display packaging. Complete original packaging with the COA adds to a piece's desirability, and our listings note it where present.
Privy Mark
A small secondary mark or symbol added to a coin's design, historically a mint's signature and today often marking an event, anniversary, or special release.
Proof (PF, PR)
A striking method using polished dies and prepared blanks, producing mirror fields and frosted devices. The default finish of premium modern collector coins.
Prooflike (PL)
A mint state coin with reflectivity approaching a proof, designated PL by the grading service.
Re-strike
An official later striking of an earlier design. Legitimate re-strikes are documented as such and collected on their own terms, distinct from the original issue.
Relief
The height of the design above the field. Standard relief serves circulation; high and ultra high relief push toward sculpture.
Reverse
The back face of a coin. On licensed issues, usually the design side: the character, scene, or artwork the piece exists for.
Rim
The raised border around a coin's circumference, struck up to protect the design from wear.
Round
Privately minted metal with no issuing nation and no denomination, collected for silver content and artwork. Not legal tender, and honest listings say so.
Sculptor and Engraver
The artists who model and cut a coin's design. Some programs credit them on the coin or its documentation, and collectors follow favorite engravers across issues.
Security Features
Anti-counterfeit elements on notes and coins: intaglio printing, holographic foils, serial numbers, micro-engraving. Currency grade collectible notes carry the same classes of features as circulating money.
Selective Gilding
Gilding applied to chosen design elements rather than the whole coin, creating gold on silver contrast. See gilded silver coins.
Serial Number
The unique printed number on a note. Low numbers and distinctive patterns are collected in their own right, and on Disney Dollars the serial's letter prefix carries the series.
Series Letter
The letter identifying a Disney Dollar's issue series, such as A, AA, D, T, or E. Collectors organize the field by it. See the certified Disney Dollars collection.
Slab
The sealed, tamper evident holder a grading service encapsulates a certified piece in, with the label and certificate number inside. See How to Read a Slab Label.
Smartminting
The striking technology associated with producer CIT Coin Invest, achieving unusual sculptural depth from standard blanks. It has played a significant role in the modern ultra high relief movement.
Sovereign Mint
A state owned national mint, such as the Royal Canadian Mint or The Perth Mint, as distinct from private producers. Sovereign production adds institutional provenance.
Specimen (SP)
A special striking that falls between mint state and proof, designated SP on the label.
Spot Price
The current market price of raw precious metal by weight. Collectible numismatic pieces trade on license, edition, and grade, and their prices move independently of spot.
Star Designation
NGC's star, added to a grade for exceptional eye appeal. A 70 with a star earned both the numeric grade and the aesthetic distinction.
Sterling Silver
A .925 fine silver alloy, the traditional standard for silverware and some classic coinage. Most modern collector coins use .999 or finer instead.
Strike
The act of impressing the design into the planchet, and the quality of the result. A well struck coin shows full design detail; a weak strike does not, whatever its wear.
Toning
Natural color change on silver from environmental exposure over time. Attractive toning can be prized; it is distinct from applied antiquing, which is a finish.
Top Pop
Collector shorthand for a piece at the top of its population report, with none graded finer. Used interchangeably with Finest Known.
Troy Ounce
The precious metals weight standard, about 31.1 grams, heavier than the everyday ounce. Coin weights like 1 oz and 2 oz are troy ounces.
Two-Number Rule
Our shorthand for reading rarity through both mintage (how many were struck) and population (how many have graded, and at what level). Neither number alone tells the story. See the full explanation.
Ultra High Relief
Striking pushed to its physical limit, producing coins that read as sculpture first. Editions run small because production is slow. See the ultra high relief collection.
Uncirculated
A coin with no wear from commerce, corresponding to the mint state range of the grading scale. Every modern collector issue is uncirculated by design; the grade measures how perfectly.
UV Printing
Ultraviolet cured ink printing used for durable, high resolution color on modern coins, including designs with UV reactive elements that appear under blacklight.
Variety
A recognized variant of an issue from a die difference or design change, attributed by the grading services and collected as its own listing.

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Related concepts

Grading 101 Coin Finishes Population Reports Rarity Register