There are eleven clarity grades used by a skilled grader at 10X magnification to evaluate and determine the various clarity characteristics. VVS1 differs from VVS2 in that the the inclusion can only be seen through the pavilion. In some SI stones, inclusions are visible to the unaided eye. In I2 and I3 diamonds the inclusions are usually so numerous that they can affect the transparency and brilliance of the diamond and can also pose a durability threat. Color Grades Refers to color, or, more accurately, the absence of color.
Most diamonds have color.
Those without color are rare and so premium priced. A tinge of color is evident in most diamonds with some having a body color slightly more visible. It is important to note that these types of diamonds cost less than totally colorless diamonds because they they are less rare, not because colorless is better. In fact, a diamond with a tinge of color can hold greater appeal than icy white diamonds. D, E , and F are considered colorless.