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The 1916-D Mercury Dime : A Grading Guide from AG3 to VG8
By CoinWeek .....
Because of its cost and status as a key date, the 1916-D Mercury Dime attracts a devoted following even in the lowest...
From the PCGS Coin Grading Room: Distribution, Condition Census and Provenance
By Kyle Knapp for Professional Coin Grading Service
Introduction to Coin Grading: Understanding Coin Grading Beyond the Basics
Every introduction to coin grading begins with broad,...
A Visual History of the 1909 V.D.B. Lincoln Wheat Penny on Mars
A Lincoln Cent on Mars: The Story of a 1909 V.D.B. Penny in Space
If you have ever wondered how coins behave beyond Earth, this...
From the PCGS Coin Grading Room: Surface Smoothing and Other Metal Mischief
By Kyle Clifford Knapp for PCGS ......
From The PCGS Coin Grading Room
One of the many dreaded PCGS No Grades that may prevent a coin...
CAC-Approved Coins Command Strong Premiums in February 2026 Auctions
Coins approved by the Certified Acceptance Corporation (CAC) and those encapsulated by CAC Grading (CACG) delivered notable results across several major U.S. auctions in...
How Proof Gold Coins Are Graded Differently Than Business Strikes
By Doug Winter - RareGoldCoins.com
Proof Gold Coin Grading vs. Business Strikes
What Every Collector Needs to Understand
To fully understand Proof gold coin grading, we must...
CAC Graded Coins Continue to Command Premiums in January 2026 Public Auctions
Certified Acceptance Corporation (CAC)–approved and CAC Grading (CACG)–encapsulated coins achieved strong results at public auctions in January 2026. Across multiple firms and series, CAC-approved...
PCGS Marks 40 Years as a Defining Force in Third-Party Coin Grading
On February 3, 2026, Professional Coin Grading Service (PCGS) reaches a milestone few numismatic institutions can claim. Forty years after opening its doors, PCGS...
Pedigrees & Hoards: Shipwreck Coins
Collecting Shipwreck Coins: History, Grading Standards, and Provenance
By Rick Bretz for CoinWeek
Shipwreck coins occupy a distinctive niche within numismatics. They combine historical documentation, rarity,...
AU58 : A Grade Just Shy of Mint State
By CoinWeek Notes .....
Also known as "About Uncirculated 58", or "Borderline BU," AU58 is a specific grade on the Sheldon Scale. A properly graded...
NGC Launches Official America250™ Labels to Celebrate U.S. Semiquincentennial
Celebrate America's 250th in Style with the Newest NGC Certification Label
As the United States approaches its 250th anniversary in 2026, Numismatic Guaranty Company® (NGC®)...
Buy the Holder, Not the Coin – 10 Certification Slabs to Look For
By David Schwager for CoinWeek .....
“We Buy Rare Plastic”
I haven’t seen this sign outside of a coin shop yet, but the right holder can...
CAC Coins Bring Premiums in December
CAC-approved, CACG-encapsulated coins fared well in public sales during December 2025. Here are a dozen examples, selected from a larger set of results that...
Some Practical Coin Grading Concepts for the Average Collector
By Roger W. Burdette, special to CoinWeek .....
I remember a while back, a collector (DeplorableDan) posted photos and comments about an 1836 Quarter Eagle,...
PCGS Grading Room: Surface Smoothing and Other Forms of Metal Alteration
Surface preservation remains one of the most critical and most misunderstood factors in professional coin grading. Among the issues that can prevent a coin...
