Clarity refers to the internal characteristics of a diamond that may or may not be present. The number, size, type and location of imperfections in a diamond determine its clarity. These imperfections come in many forms: black piques, feathers and clouds to name a few.
The importance of clarity, as with all of the four C's, is subjective. Some people value clarity over color or carat, while others may put carat above anything else. It all comes down to individual preference.
The non-subjective importance of clarity lies in whether the imperfections affect the appearance of the stone. Diamonds with a clarity grade of VS and above are not greatly affected by the imperfections because they can only be seen with magnification. Imperfections do not affect the "sparkle" of a diamond unless they are large enough to obstruct light within the stone.
Quick FAQs About Clarity