Colored Gemstone Grading

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Welcome to the Colored Gemstone Grading Course. The purpose of this course is to provide you with a practical view of the grading of colored gemstones. You should not attempt this course until you have completed the ISG Colored Gemstone Identification course. We are going to cover very little theory...although the first lesson is going to feature some review information from Gem ID to insure your understanding of how that information applies to the grading of colored gemstones.

Lesson 1: Overview

Lesson 2: Evaluation of Gemstone Color

Lesson 3: Evaluation of Gemstone Cut

Lesson 4: Evaluation of Gemstone Clarity

Lesson 5: Evaluating Unusual Gemstones Pt 1

Lesson 6: Evaluating Unusual Gemstones Pt 2

Here are the links to your Quick Quiz and Final Exam


Quick Quiz Lesson 1                  Quick Quiz Lesson 2

Quick Quiz Lesson 3                  Quick Quiz Lesson 4

Quick Quiz Lesson 5                  Quick Quiz Lesson 6


Colored Gemstone Grading Final Exam