How To Grade Set Gemstones


Step 4: Gem Grading

Lesson 4

Set Gemstones - Diamonds
“Diamond Ring” by Ricky Artigas is licensed under CC By 2.0

Few gemologists deal strictly with loose stones. Most may occasionally have to grade set gemstones. Mounted stones can’t be graded the same way as loose stones. They require special attention. For example, a set gem can’t be weighed, and its setting influences the color. In addition, you can’t see as much of the interior. Each of the Four Cs (Carat, Cut, Clarity, and Color) …

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