Clarity is a term used to describe the absence or presence of flaws inside or on the surface of a diamond. In other words, the clarity of a diamond refers to a diamonds clearness or purity. When these flaws / marks occur internally, they are called inclusions and when these flaws / marks occur on the surface, they are known as blemishes. These slight flaws make every diamond quite unique but they also do affect the beauty and value of the diamond. Diamond Clarity Grading Scale grades a Diamond with any of the following grades: F (Flawless), IF (Internally Flawless), VVS1 - VVS2 (Very, Very Slightly Included - 1 & 2), VS1 - VS2 (Very Slightly Included - 1 & 2), SI1 - SI2 (Slightly Included - 1 & 2), I1 - I2 - I3 (Included - 1, 2 & 3).