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Numismatic Guaranty Corporation

When NGC was founded in 1987, it heralded the introduction of a new standard of integrity in coin grading. From the beginning NGC focused on only one objective, a standard of consistent and accurate grading.

About NGC

As NGC has grown to become the leader in third-party grading services, we have maintained a steadfast and uncompromising commitment to this standard. The knowledge, integrity and dedication of NGC’s team of numismatic professionals ensures you a level of grading consistency unparalleled among grading services. This record of consistency, built over the years, has helped to foster greater stability throughout the rare coin marketplace.

NGC Guides & Services

NGC 30th Anniversary Video

6/21/2017

The video highlights some of the company’s achievements, including its international expansion

Numismatic Guaranty Corporation® (NGC®) has released a video to celebrate its 30th anniversary.

Founded in 1987, NGC has been committed to accuracy, consistency and integrity. These principles have led NGC to become the world’s largest third-party coin grading service with more than 37 million coins certified.

The NGC 30th Anniversary Video highlights some of the company’s achievements, including its international expansion. NGC now grades coins full-time at its offices in the United States and China and operates Official Submission Centers in China, Germany, Hong Kong, Korea, Singapore and Japan.

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Numismatic Guaranty Corporation (NGC)

Walking Liberty Half Dollars Have Made Impressive Strides

A closer look at collector demand for Ultra-Gem Walking Liberty Half Dollars By Jim Bisognani for Numismatic Guaranty Corporation (NGC) ......   Spring is definitely here, my...

NGC Certifies Very Rare 2016 Silver Eagle Mint Error

The severity of the die clash is among the most dramatic ever seen on a US Mint bullion coin ( Silver Eagle Mint Error...

NGC Ancient Coins – The Tetrarchy of Diocletian

NGC Ancients explores the Age of Diocletian and its coinage The last two months of 284 CE marked a crisis point for the Roman Empire....

For Coin Collectors, Museums are Closer Than Ever

Numismatic and other treasures in the world's museums are being digitized so everyone can access them By Jeff Garrett for Numismatic Guaranty Corporation (NGC) ......   One...

World Paper Money: The Clara Schumann German Mark

During the 1980s, the Deutsche Bundesbank issued a new series of banknotes, which included famous German artists and scientists as a way to honor...

NGC Experts Identify Missing Mintmark Mint Error on 2014 5oz Silver...

Numismatic Guaranty Corporation® (NGC®) has identified five 2014 Great Smoky Mountains Five-Ounce Specimen coins with a significant mint error: they are missing the “P”...

CSNS – A Great Coin Show and A Great Collector Coin...

The CSNS Coin Show and Coin Auction included amazing American numismatic treasures that predate the US Mint By Jim Bisognani for Numismatic Guaranty Corporation (NGC)...

Counterfeit Coin Detection – 1850 JB Costa Rica Gold Escudo

 A missing skirt is among the clues that this coin isn't real. Only 6,167 Costa Rican gold escudos were struck in 1850, making it a...

Numismatic Guaranty Corporation -Extremely Rare “Details” Norwegian Coin Sells for $432K

An extremely rare 1666 Frederik III 3 Speciedaler certified by NGC tops Heritage Auctions' world sale in Chicago. A 17th Century Norwegian coin graded by...

NGC Ancient Coins: The Second Punic War

Coins are the most abundant relics of the Second Punic War One of the most interesting and most challenging themes in the world of ancient...

What Is a 1999 Delaware State Quarter Worth?

By Charles Morgan and Hubert Walker for CoinWeek ....   Hard to believe but it’s been almost 20 years since the United States Mint inaugurated its...

Numismatic Technology and Markets – A Revolution in Rare Coin Price...

As technology makes information more accessible, including price guides and price discovery, the educated coin collector is the winner By Jeff Garrett for Numismatic Guaranty...

Ancient Coins – A Survey of Roman Gold Coins — Part...

By Josh Illingworth - NGC Ancients ......   Part 1 At the beginning of the fourth century CE, the Roman Empire found itself in a prolonged economic decline....

Counterfeit Coin Detection – A Fake 1861 Type 2 US Gold...

Counterfeit coin - 1861 Type 2 Quarter Eagle By Max Spiegel - Numismatic Guaranty Corporation (NGC) ......   Raised lumps of metal and lack of detail are...

Numismatic Guaranty Corporation – The Allure of World Coins

The thrill of the hunt for world coins, whether it's a vintage Norwegian mega-rarity or, from half a world away, a modern tree frog By...