Natural diamonds are the result of carbon exposed to intense heat and pressure deep in the earth. This process can result in a variety of internal characteristics called “inclusions” and external characteristics called “blemishes”.
Some common inclusions range from pinpoints, clouds, crystals, and feathers.
The Clarity scale consists of 6 categories, some of which are divided into 11 specific grades.
No inclusions and no blemishes visible under 10x magnification. Extremely rare.
No inclusions visible under 10x magnification. Extremely rare.
|Very Very Slight Included. Inclusions are so slight they are difficult to see under 10x magnification by a skilled grader.
|Very Slightly Included. Inclusions are considered minor and still regarded as “clean”. They can be observed under 10x magnification with some effort.
|Slightly Included. Inclusions are noticeable under 10x magnification and can be difficult to spot with the naked eye.
|I1, I2, I3
|Included. Inclusions are obvious under 10x magnification and apparent to the naked eye. They may have an effect on transparency and brilliance.