Clarity
Here's an exam you actually want to get an "F" in...
When it comes to the clarity of a diamond, you actually want to have your diamond rated an "F". That rare breed of diamond isn't failing – it's flawless.
Diamonds are graded according to purity or clearness. Marks, nicks, or blemishes in a diamond are called inclusions. The less visible the inclusions, the more the diamond is worth. All diamonds are rated on this scale:
