inclusions

These gemology cheat sheets review gem color and clarity grading, specific information on evaluating diamonds and opals, and basic gem identification…

A visual examination is the first step to identifying a gemstone. These quizzes will help student gemologists learn to recognize what they might…

Test your knowledge of refractometer gem analysis with this mini-quiz. You can review material on any question you miss at the end of the quiz.

Learning how to identify gems involves more than just data. This gem identification quiz can help novice gemologists learn how to choose tests…

How does the GIA diamond cut grading system work? Our guide will explain what the grades mean and how gemologists evaluate round brilliant diamond…

Learning how to conduct a gemstone examination takes practice. Follow an expert gemologist step-by-step through tests of five unknown samples.…

Gemstone identification requires a good reference library and some basic gemology tools. Before you go shopping, learn more about what you’ll…

One-carat oval diamonds are versatile alternatives to one-carat rounds. Our guide can help you find the right oval-cut diamond for your own engagement…

The dichroscope is one of the most useful instruments a gemologist can have. Its primary purpose is to determine the pleochroism of a gem.