Included 1. Some inclusions could be visible to the naked eye.

Slightly included 2. The inclusions are visible under 10x magnification, and may be visible to the naked eye.

Slightly included 1. The inclusions are visible under 10x magnification, but are not very visible to the naked eye.

Very slightly included 2. Inclusions are difficult to detect under 10x magnification. Inclusions are typically not visible to the naked eye.

Very slightly included 1. Inclusions are difficult to detect under 10x magnification. Inclusions are not visible to the naked eye.

Very very slightly included 2. The inclusions are difficult to see even under 10x magnification. They have only slightly more inclusions than VVS1 diamonds.

Very very slightly included 1. The inclusions are difficult to see even under 10x magnification.

Flawless. The ultimate in diamond clarity, completely free of internal or external flaws.