Most diamonds contain a few minor flaws or "inclusions" that affect their clarity.
An inclusion is any spot, scratch, bubble, or line that occurred when the diamond was still being formed deep in the earth.
Most inclusions are not visible to the naked eye, so gem laboratories use a magnifying glass (at 10x magnification) to determine the amount, size, position, nature, and color of the inclusions.
The clarity of diamonds ranges from "flawless" to "included".
You should avoid diamonds with visible flaws that affect their overall beauty or durability, but it is not necessary to select a flawless diamond. To make sure that your diamond has no visible flaws, we recommend stones with a grade of SI2 or higher. However, some SI diamonds can provide great value as many are virtually flawless to the naked eye.