NGC Research

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.
• NGC Census
  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.
• VarietyPlus^® Guide
  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.
• Glossary
  An alphabetical glossary of common numismatic terms.