While clarity is graded the same in natural color diamonds as it is in colorless diamonds, it can be a more difficult process. This is because the color in a natural color diamond can hide inclusions, making them more difficult to spot.
Clarity is determined by the amount, size, location, and nature of inclusions (internal imperfections) and blemishes (external imperfections) in a diamond. In colorless diamonds, clarity is one of the most important factors for determining the stone’s value. In natural color diamonds, however, the rarity of the color is judged to be more important than the clarity when determining value. Even with a lower clarity score, a rare color diamond may still be highly desirable.
The diamond grading clarity scale is as follows:
F – Flawless; free from all inclusions and blemishes
IF – Internally Flawless; no inclusions visible at 10x magnification
VVS1 – Very, Very Slightly Included – inclusions are extremely difficult to see at 10x magnification
VVS2 – Very, Very Slightly Included – inclusions that are very difficult to see at 10x magnification
VS1 – Very Slightly Included – minor inclusions that are hard to spot at 10x magnification
VS2 – Very Slightly Included – minor inclusions that are somewhat difficult to locate at 10x magnification
SI1 – Slightly Included – Noticeable inclusions that are easy to locate at 10x magnification
SI2 – Slightly Included – Noticeable inclusions that are very easy to see at 10x magnification
I1 – Included – obvious inclusions that are somewhat easy to see with the naked eye
I2 – Included – obvious inclusions that are easy to locate with the naked eye
I3 – Included – obvious inclusions that are very easy to see with the naked eye