Distinguishing Diamonds: Educating Your Eyes

Step 4: Gem Grading

Lesson 10


distinguishing diamonds - read through test
A read through test can help distinguish diamonds from imitations with lower refractive indices.

Distinguishing diamonds from their look-alikes is a prerequisite to diamond grading. Assigning color, clarity, and cut grades to a gem does no good if you can’t tell if it’s a diamond or a simulant.

In theory, you can distinguish a diamond simply by looking at it. No other …

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