Learn how to judge and grade clarity, color, and cut quality factors of round brilliant diamonds. Recognize the most common diamond features, and spend over 18 hours practicing grading techniques with actual diamonds that have been carefully selected and graded in GIA's own Gem Laboratory. Through our unique combination of one-on-one coaching and integrated multimedia presentations, you learn to grade diamonds consistently and accurately using modern gem microscopes. Learn diamond grading from the creators of the 4Cs and the International Diamond Grading System™ - GIA.