CLARITY
Clarity is the evaluation of a diamond's internal and external characteristics; the fewer inclusions or blemishes, the more desirable the diamond. The fewer inclusions or blemishes, the more rare the diamond. Rarity affects a diamonds value.
“Inclusions” are internal, that is, inside the diamond. Two common inclusions are “crystals” and “feathers.” Crystals are merely minerals trapped inside the diamond; feathers are breaks in the diamond. “Blemishes” are usually very small and are only found on the surface of diamonds. These may be a result of the polishing process of through the wear of the diamond. Diamonds without inclusions or blemishes are rare; however, most characteristics can only be seen with magnification.
Diamonds are given a clarity grade that ranges from flawless (FL) to diamonds with more prominent inclusions (I3). Every diamond is unique. But none are absolutely perfect even though some come close, even under 10× magnification. Known as flawless diamonds, they are exceptionally rare.

