Diamond clarity grades are based on the inclusions and surface imperfections a diamond can see under a 10x magnifying glass. According to the gia standard, diamond clarity can be divided into six types and 11 grades: Flawless FL, Internally Flawless IF, Very Slightly Flawless VVS, Slightly Included VS, Slightly Included SI, and Included I.
Flawless (FL): FL is the most perfect grade of diamond clarity. It means that when a diamond is observed under a 10x magnifying glass, there are no internal inclusions and no external flaws. This type of diamond is very rare.
Internally Flawless (IF): IF is second only to FL, which means that when a diamond is observed under a 10x magnifying glass, there are no inclusions inside the diamond. Although there are tiny flaws on the surface, they can be removed by manual polishing.
Very Slightly Included (VVS): VVS is divided into two levels: VVS1 and VVS2. When this type of diamond is observed under a 10x magnifying glass, it can be seen that there are tiny flaws inside the diamond, but they are very small, even for professional appraisers. Also hard to see.
Slightly included grade (VS): VS slightly included grade is divided into VS1 and VS2 grades, which means that when a diamond is observed under a 10x magnifying glass, it can be seen that there are flaws inside or on the surface of the diamond, but they are very small.
Micro Inclusion (SI): The SI grade is divided into two grades, SI1 and SI2, which means that the diamond has clearly visible flaws when observed under a 10x magnifying glass.
Inclusion grade (I): Refers to the diamond's flaws can be clearly seen under a 10x magnifying glass. The flaws in this type of diamond are already obvious, and it is generally not recommended to choose this type of diamond.