Clarity measures the amount, size and placement of natural, internal inclusions, and external blemishes. Grades run from “Flawless,” with virtually no imperfections, to “Included,” which contain a significant number of imperfections.
When looking at diamonds to purchase, the most important thing is to make sure you do not see any of these inclusions without magnification. In most cases, you will be able to see inclusions in the diamond with 10x magnification. Having inclusions in a diamond can actually benefit you in regards to price. The grading of clarity is strictly done through 10x magnification, and only viewed through the top of the diamond; it is never turned over or onto its side.