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Learning Guide
Coin Collecting

Coin Collecting

Collecting coins is one of the world’s oldest hobbies and experiences that continues in popularity today. Learn more about the best ways to start, organize, or sell your collections today.

Wyoming State Quarter Errors 

Wyoming State Quarter Errors 

Wyoming state quarters have been documented with a variety of mint errors, including the Pooping Horse die break, wrong planchets,…
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Delaware State Quarter Errors 

Delaware State Quarter Errors 

The Delaware state quarter was the first issue in the 50 State Quarters Program and has produced a range of…
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Connecticut State Quarter Errors 

Connecticut State Quarter Errors 

Connecticut state quarters have been documented with a wide range of mint errors, including wrong planchets, missing clad layers, off-center…
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All Coin Collecting Resources

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What Are Australian Domed Gold Coins? 

This Answer covers Australian domed gold coins by showing how they shine through .9999 fine gold, limited mintages, and designs tied to history, nature, and
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What is the Lincoln-Garfield Medal? 

This Answer covers the 1882 Lincoln-Garfield Medal, explaining its purpose, authorization, issuance, and varieties.
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What is the John Adams Dollar Coin?

This Answer describes the design of the Presidential John Adams Dollar coin, providing a brief history of John Adams, as well as the value of
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What is Pennyweight?

Do you know what a pennyweight is? This Answer explores the pennyweight measure of mass and provides a historical background to its use.
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How Do I Find the Value of a Double-Sided Quarter? 

This Answer explains why all but a handful of double-sided quarters and other coins are post-mint alterations and describes the value of several authenticated double-sided
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What is a Bickford Dollar? 

This Answer explains the production of Dana Bickford’s pattern dollars, describing their context, issue, and why they were not adopted.
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What Type of Error Causes a Three-Digit Date on Coins?  

This Answer explores some of the potential root causes of coins with a three-digit date and describes the parts of the minting process those would
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What is a Widow’s Mite? 

If you have ever seen the biblical account of the Widow’s Mite, this Answer describes the smallest Judean coin and considers its value in ancient
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What is a Clipped Planchet? 

This Answer covers clipped planchet error coins, describing some of the most common varieties of clipped planchets, as well as what factors lead to their
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What is an Italian Lira? 

This Answer provides a brief history of the Italian lira and explains the precious metal content of lire from 1861 to date.
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When will the 2025 Chinese Silver Pandas Be Released?

This Answer discusses the forthcoming release of 2025 Chinese Silver Pandas and explores some of the noteworthy changes to this series since their introduction.
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How are Coin Hubs Made? 

This Answer provides the steps used to produce coin hubs and coin dies, explaining each step in detail.
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What Does AVDP Ounce Mean?

This Answer explains the meaning behind AVDP and explains the differences and history of the Avoirdupois and Troy measurement systems.
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My Dime is Thin and Lightweight. Is it an Error Coin? 

Have you ever seen a coin that is too thin and lightweight for its issue? This Answer explores the likely cause of this error coin.
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Is My Kansas State Quarter Missing Letters an Error Coin? 

If you have seen coins missing part or all of a word, phrase, mintmark, or design, this Answer may help you determine its error.
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What is the $3 Gold Indian Princess Coin? 

This Answer discusses the $3 Gold Indian Princess coin, describing its issuance, mintage, design, and discontinuation.
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What is a Ducat?

This Answer covers the ducat and explores some of the roles it has served over the last 800 years.
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Is There a Puerto Rico Quarter? 

This Answer covers the Puerto Rico quarter, describing its design, reception, and the bill that authorized its issue.
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How Much Are Silver South African Shillings Worth? 

This Answer explores some of the factors that influence the value of South African Silver Shillings and explains the different iterations of the government that
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What’s the Difference Between Blanks and Planchets? 

This Answer discusses blanks and planchets, their value, and the difference between them.
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What is a Goloid Metric Pattern? 

This Answer provides an explanation of the origins, composition, and legacy of the goloid metric pattern series issued from 1878 until 1880.
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What is Pennyweight?

Do you know what a pennyweight is? This Answer explores the pennyweight measure of mass and provides a historical background to its use.
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More Guides for You

What is Bullion?

Gold, Silver, Platinum, and Palladium all come in various forms and sizes to create a variety of options for investors and collectors.  

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What Is an Eagle

Since the U.S. Mint’s American Eagle program began in 1986, Gold and Silver Eagles have remained a popular choice among both investors and collectors

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