Flawless-Internally Flawless: Diamonds in this category are free from internal and external flaws when examined under 10x magnification. FL diamonds have no visible inclusions or blemishes, while IF diamonds may have extremely minute surface blemishes that are only visible under intense magnification.

Very, Very Slightly Included: These diamonds contain minute inclusions that are extremely difficult to detect even under 10x magnification. VVS1 diamonds have inclusions that are typically smaller and less noticeable than those in VVS2 diamonds

Very Slightly Included: Diamonds in this category contain minor inclusions that are visible under 10x magnification but are typically not visible to the naked eye. VS1 diamonds have fewer and smaller inclusions compared to VS2 diamonds.

Slightly Included: Diamonds in this category contain noticeable inclusions that are visible under 10x magnification and may be visible to the naked eye. SI1 diamonds have inclusions that are typically smaller and less noticeable than those in SI2 diamonds.