Expertise at your fingertips. You don’t need to be a gemologist to purchase a diamond with confidence. You just need to know where to find one. GIA is the trusted benchmark for …

GIA’s diamond and colored stone grading reports are respected industry-wide for their accuracy, reliability and consistency. These reports include information on the identity, quality grade, …

While choosing a diamond is a very personal decision, evaluating a diamond should always be a matter of precision. At GIA, we are incredibly proud that our 4Cs of diamond quality continue …

How GIA Analyzes Pearls from Start to Finish Easy, step-by-step guide to how GIA analyzes pearls in its laboratory. Read More

This Client Code of Conduct (“the Code”) is fundamental to furthering GIA’s mission and applies to all GIA clients and their representatives. As a GIA client, you are expected to conduct …

GIA accepts applications for online courses from individuals who are at least 16 years of age and have a high school diploma or the equivalent. English-language proficiency is required for …

GIA Diamond Focus ® Report Submission Guidelines The GIA Diamond Focus ® Report is a cost-effective grading report delivering key grading information in a digital format for select …

Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

Standards - GIA developed and maintains the methods and best practices for evaluating diamonds, colored stones and pearls. As creator of the 4Cs and the GIA International …

GIA Instruments User Guides Download the user guide PDF for the following instruments, available in the languages listed below. GIA ® Gemolite ® NXT English GIA ® Gemolite ® …