GIA 4Cs Guide App

GIA’s 4Cs Guide app features video and interactive tools that teach you about how GIA grades color, cut, clarity and carat weight. It explains GIA’s D-to-Z color scale and how diamond color can affect value, GIA’s clarity scale and how diamond clarity can affect value, the factors that affect a diamond’s cut grade and the origins of the carat system.

Available in English and Simplified Chinese.


Interactive tools show:
  • How diamond color changes across the GIA D-to-Z Color Scale
  • Typical inclusions and blemishes at various points in the GIA Clarity Scale
  • A diamond’s anatomy and how various parameters influence a diamond’s cut grade
  • How a diamond’s size changes by carat weight and enables you to compare the sizes of different diamonds
  • An interactive GIA Grading Report Anatomy – to help consumers understand the different elements of a GIA report

Additional features include:
  • My Diamond Wish List that allows you to keep a record of the diamonds you’ve seen and considered by entering any diamond’s relevant information, including its report number, 4Cs information, price and the retailer’s address and contact information in yourwish list.
  • Information on fluorescence, common diamond treatments, synthetics and simulants.
  • Direct access to GIA Report Check (network connection required) - GIA’s online database of diamond grading reports and Diamond Dossiers. You can verify the contents of a GIA report and view a PDF version of that report simply by entering a GIA report number and carat weight.

4Cs App for Retailers

Retailers can find a version of the 4Cs app for use at point of sale with
  • Informative and interactive content to help you educate your clients about diamonds, the 4Cs and GIA reports
  • Direct access to GIA Report Check (network connection required)
  • Perfect for over-the-counter presentations using any tablet or smartphone device
Available in English and Simplified Chinese.

Learn more and download

Android is a trademark of Google Inc.
Apple, the Apple logo, iPhone and iPad are trademarks of Apple Inc., registered in the U.S. and other countries.

Learn More About Diamond

why we love diamond
Explore diamond history, research, quality factors, and more in the GIA Gem Encyclopedia.
Read More


Learn More


Learn More


Learn More


Learn More

You Might Also Like

Resources For Retailers
Find a Retailer
learn more
Shop the Campus Store
Shop the Campus Store
Learn More
Quality Assurance Benchmarks
Learn More
G&G Winter 2016 Edition
Learn more