Every industry has its own language, and precious metals is no different. In this lesson you will learn the key terms and phrases used daily in bullion dealing, coin shops, and refining operations. Knowing this vocabulary signals to employers and clients that you belong in this business.

What You Will Learn

Core terminology used in precious metals and bullion operations
How to speak confidently with dealers, buyers, and clients
Terms specific to coins, bars, scrap, and refining

Industry Terminology You Must Know

A Comprehensive Guide for Precious Metals Professionals

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Bullion
22 terms

Alloy

A metal created by combining two or more elements, often mixed to achieve specific properties like hardness or color. In precious metals, alloys adjust purity and workability (e.g., 14K gold is an alloy of gold with copper and other metals).

Assay

A test performed to determine the purity and composition of a precious metal. Assays use various methods including, but not limited to, fire assay and XRF assay.

Bar

A standardized form of precious metal cast into a rectangular shape for storage, transport, and trading. Bars come in various weights and are typically marked with weight, purity, and serial numbers.

Bullion

Precious metals in bulk form (typically bars, ingots, or coins) valued primarily for their metal content and weight, rather than collectibility or beauty. Bullion is traded based on weight, purity, and current spot prices.

Carat

A unit of weight used for gemstones, equal to 200 milligrams (0.2 grams).

Fineness

The proportion of pure precious metal in an alloy, expressed as a decimal or percentage. For example, .999 fine silver contains 99.9% pure silver.

Gram

The standard metric unit of weight used internationally for precious metals, equal to 1/1000 of a kilogram. Most bullion is weighed and priced in grams or troy ounces.

Hallmark

An official mark stamped on precious metal items indicating purity, maker, or assay office approval. Common in jewelry and silver, hallmarks provide certification of metal content and origin.

Ingot

A cast piece of precious metal, typically larger than a bar, often with irregular surfaces from the casting process. Ingots are used for storage and processing before being refined or cast into bars. Sometimes “bar” and “ingot” are used interchangeably.

Karat

A measure of gold purity where 24 karats represents pure gold. 18K gold is 18 parts pure gold (75%), 14K is 14 parts (58.3%), commonly used in jewelry.

Lot

A quantity of precious metal offered for sale as a single group. Lots can be single items or multiple pieces grouped together for auction or wholesale trading.

Melt Value

The monetary worth of an item based solely on the weight and purity of its precious metal content. Calculated by multiplying the metal content by the current spot price.

Mint Condition

For bullion coins or bars, the state when first produced with no wear, scratches, or discoloration. Mint condition commands higher premiums than circulated or used pieces.

Numismatic Value

The worth of a precious metal based on rarity, historical significance, collector demand, or condition (not just weight and purity). A rare coin’s numismatic value can far exceed its bullion value.

Ounce (Troy)

The standard unit of weight for precious metal coins and bars in the USA, equal to 31.1035 grams. Different from the avoirdupois ounce used for general goods; always clarify “troy ounce” when pricing metals.

Proof

A coin or medal struck with specialized dies and usually polished blanks to produce sharp details and a mirror-like field. Proofs are created for collectors and are not circulated.

Purity

The percentage or proportion of pure precious metal in an item. Expressed as a decimal (.999), percentage (99.9%), or karats (24K). Higher purity commands higher prices.

Specifications

The documented physical and compositional details of a precious metal item, including weight, dimensions, purity, and finish. Specifications allow buyers and sellers to trade with confidence and are the basis for grading, authentication, and settling disputes.

Spot Price

The current market price for one troy ounce of a precious metal for immediate delivery. Bullion dealers base their buy and sell prices on spot price plus or minus a markup or discount.

Spread

The difference between the price a dealer will pay (bid) and the price they will sell (ask) for precious metals. A tighter spread indicates a more liquid market; wider spreads are common for unusual sizes or purities.

Tola

A unit of weight used in India and other regions, equal to approximately 11.66 grams. Still used in traditional precious metals trading in South Asia.

Tonne (Metric Ton)

A unit of weight equal to 1,000 kilograms. Used for large-scale bullion inventory and wholesale trading statistics.

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Refining
15 terms

Assay Value

The determined purity and weight of precious metal in a sample, used to calculate payment or refining fees. Assay results form the basis of refining transactions.

Bullion Refining

The industrial process of purifying mixed scrap metals or low-purity material into high-purity bullion. Removes base metals and impurities to achieve desired fineness standards.

Cupellation

A refining process using a porous cupel (typically made of bone ash) at high heat to separate precious metals from base metals. The base metals oxidize and are absorbed by the cupel, leaving pure precious metal. Cupellation is a key step in performing fire assays.

Electrolytic Refining

A method using electrical current to purify metals. The impure metal acts as the anode and pure metal deposits on the cathode as electrical current drives metal ions across the electrolyte.

Feed Material

The scrap, low-purity, or mixed metals submitted to a refinery for processing. Feed material composition determines the refining method and expected yield.

Fire Assay

A destructive testing method using high-temperature heating in a furnace to determine the precious metal content of a sample. Fire assay is the most accurate and widely accepted method for gold and silver analysis and is typically used for final settlement in refining transactions. The process culminates in cupellation, producing a small bead of pure metal that is weighed to calculate yield.

Flux

A chemical compound added during refining to lower melting points and facilitate separation of metals. Flux removes oxides and impurities and helps metals combine or separate. Borax is a common flux.

Parting

A refining process using acids (typically nitric or sulfuric acid) to selectively dissolve metals and separate them. Aqua regia, a mixture of nitric and hydrochloric acid, is used to dissolve gold.

Precipitate

A solid material that separates out of a solution during the refining or chemical processing of precious metals. In gold and silver refining, precipitation is used to recover dissolved metals from solution; for example, gold is often precipitated from aqua regia solution using a reducing agent such as sodium metabisulfite. The precipitate is then collected, dried, and smelted into a bar or bead.

Precious Metal Recovery

The extraction and reclamation of valuable metals from scrap, electronic waste, or low-grade material. Recovery processes aim to maximize yield while managing byproducts and waste.

Refinery Grade

The quality standard of metal produced by a refinery, typically 99.9% or higher purity. Refinery grade metals command premium prices due to consistency and traceability.

Smelting

The process of using heat to melt metals together or to extract metals from ore. In a refinery or coin shop context, smelting most commonly refers to melting multiple pieces of scrap or feedstock into a single homogenous alloy or bar for easier handling, weighing, and assaying.

Waste Stream

The byproducts and unreusable material generated during refining. Managing waste streams includes containment, treatment, and sometimes secondary metal recovery.

XRF Assay

X-ray fluorescence assay; a non-destructive testing method that uses X-ray energy to identify the elemental composition of a metal sample. XRF is fast and requires no sample destruction, making it useful for screening incoming material. Because XRF reads only the surface of a sample, it is typically used for initial evaluation and advance payment purposes, with fire assay used for final settlement.

Yield

The percentage of precious metal recovered from input material. Calculated as (recovered metal weight / input metal weight) x 100. Lower yield reflects impurities or processing loss.

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Coins
22 terms

Box and Papers

The original mint or manufacturer packaging and accompanying documentation for a coin or set. Having original box and papers preserves collectibility, establishes authenticity, and typically increases resale value.

Bullion Coin

A precious metal coin valued primarily for its precious metal content rather than rarity or historical significance. Bullion coins are produced in large quantities and priced close to spot value.

Circulated

A coin that has been in general use and shows normal wear patterns. Circulated coins display visible scratches, discoloration, and loss of detail from handling.

Collector Grade

A coin graded and valued based on rarity, condition, and demand among collectors rather than bullion value. Collector coins typically command significant premiums over melt value.

Commemorative Coin

A special issue coin produced to mark a historical event, anniversary, or honor. Commemorative coins often have limited mintages and are sought by collectors.

Grade

A numerical or letter rating of a coin’s condition on a standardized scale (e.g., MS-70 for Mint State, or a numeric 1-70 scale). Used by professional grading services to establish a coin’s collectibility and value.

Grading Service

A professional organization (such as PCGS or NGC) that authenticates and grades coins, providing a certified holder and grade. Grading services establish consistency and protect against counterfeiting.

Mint Mark

A small letter or symbol on a coin indicating which mint produced it. Mint marks affect rarity and value; some mint marks are more desirable than others.

Mintage

The total number of coins produced from a particular die or in a particular year. Lower mintages often increase collectibility; mintage figures are key to determining rarity.

Numismatic Coin

A coin valued for its rarity, age, historical importance, or collector demand beyond its precious metal content. Numismatic coins can be worth far more than their melt value.

Obverse

The front side of a coin, typically featuring the primary design or portrait. The obverse is the “heads” side for coins bearing a person’s image.

Original Roll

A complete roll of coins as issued by the mint, sealed and unopened. Original rolls from certain years can carry significant premiums due to rarity and condition.

Patina

A natural surface layer that develops on coins over time through oxidation or chemical exposure. On silver coins in particular, patina is sometimes called toning and may be considered attractive or undesirable depending on the collector.

Proof Coin

A coin struck using specially prepared dies and blanks, usually for collectors rather than circulation. Proofs have sharper details and reflective fields compared to business-strike coins.

Reverse

The back side of a coin, typically featuring a secondary design. The reverse is the “tails” side for coins with two distinct sides.

Retail Friendly

A condition qualifier used by wholesale coin and bullion dealers when publishing a bid price, indicating that the price applies only to items free of defects, damage, or cosmetic issues that a retail customer would reasonably object to. Sellers should not expect the posted bid price for material that does not meet this standard.

Slab

A tamper-evident plastic holder issued by a professional grading service to house a graded and certified coin. Slabbed coins carry the service’s authentication guarantee and protect the coin from handling and environmental damage.

Strike

The process of pressing a coin blank between two dies to produce the final coin. Strike quality affects sharpness of detail and eye appeal; well-struck coins are more desirable.

Toning

The development of color on the surface of a coin over time, caused by oxidation or chemical reaction with the environment. Original, even toning is generally accepted by collectors; artificial or uneven toning is considered a negative.

Type Coin

A coin representing a particular design series or period, typically chosen as an example of that type. Type coins are popular with collectors who assemble one example of each design variant.

Uncirculated

A coin that has never entered general circulation and retains its mint-fresh appearance. Uncirculated coins may show light contact marks from handling during production but retain most of their original luster.

Variety

A coin variant within a series, often distinguished by mint mark, date, or minor design differences. Rare varieties can be significantly more valuable than common examples of the same coin.

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Retail and Wholesale Operations
27 terms

Account

A customer relationship with established credit terms, pricing, and delivery agreements. Wholesale accounts are used for regular purchasing by dealers or businesses.

Arbitrage

The practice of buying precious metals at a lower price in one market and selling at a higher price in another, profiting from price differences. Common across geographical markets and platforms.

Buyback Program

A service offering to purchase items back from customers, often at a set percentage of original sale price or current market value. Builds customer loyalty and manages returns.

Chain of Custody

The documented record of an item’s location and custody as it moves from one party or location to another. In precious metals operations, chain of custody is maintained through serialized tamper-evident seals, camera surveillance, and signatures collected each time an item changes hands or location.

Certification

Official documentation of authenticity, purity, and specifications. Certifications from reputable labs increase buyer confidence and justify premium pricing.

Consignment

Goods provided to a dealer for sale with the original owner retaining ownership until the item sells. The consignee pays the owner a percentage or agreed amount after the sale.

Counterfeit

A fraudulent imitation of a genuine precious metal item or coin. Detection requires expertise and specialized tools; counterfeits pose legal and financial risk.

Credit Terms

Negotiated payment conditions allowing buyers to pay at a later date (e.g., net 30 days). Common in wholesale operations for established customers.

Dead Inventory

Stock that is slow-moving or difficult to sell, tying up capital without generating returns. Management strategies include discounting or melting for bullion value.

Dealer Spread

The difference between the price a dealer pays to acquire an item and the price at which they sell it. Spreads vary based on item rarity, market demand, and competitive conditions.

Estate Liquidation

The process of evaluating, pricing, and selling precious metals and jewelry from an estate. Often performed for heirs or as part of a probate settlement.

Fencing

The illegal practice of buying or selling stolen precious metals or jewelry. Legitimate dealers maintain careful purchasing documentation to avoid inadvertent involvement.

Grading Cost

The fee paid to a professional grading service to authenticate and grade a precious metal item. Grading costs can range from $25 to over $200 depending on the item’s value and service level.

Inventory Turnover

The number of times inventory is sold and replaced during a given period. Higher turnover indicates efficient inventory management; low turnover ties up capital.

Keystone Pricing

A pricing method where retail price is double the wholesale cost. In the jewelry industry, triple key is also common, where the suggested retail price is three times the wholesale cost. Both are used as benchmarks, though actual margins vary based on item type and market conditions.

Liquidity

The ease with which an item can be bought or sold quickly without a significan