NGC offers a comprehensive range of numismatic research tools, from coin reference catalogs and price guides to NGC certification verification and grading guides. Select any of the tools below to learn more.
NGC Coin Explorer
The most comprehensive online coin reference for US coins.
A complete population of NGC-graded coins, divided by type and grade.
Verify NGC Certification
A database for comparing and verifying the NGC description and grade of any NGC-certified coin.
NGC US Coin Price Guide
A guide to certified US coin values across nearly all grades.
NGC World Coin Price Guide
A complete catalog of values for world coins from 1600 to date.
NGC Chinese Modern Coin Price Guide
A comprehensive resource for NGC-certified Panda, Lunar, Unicorn and other modern Chinese coins.
World Gold Coins Value Guide
A guide to the average asking prices of common-date, NGC-certified world coins.
NGC Auction Central
A database of upcoming and completed auctions for NGC-certified coins.
A comprehensive guide to the coin varieties NGC recognizes on its website.
Coin Grading Guide: From 1 to 70
An in-depth look at the entire series of US coins, with tips by NGC Research Director David Lange on how each type is graded.
An alphabetical glossary of common numismatic terms.
A comprehensive list of the resources used by NGC to research information for VarietyPlus® and the NGC Coin Encyclopedia.