Diamond clarity refers to the number, position and size of the inclusions that occur naturally inside diamonds. The fewer and less obvious the inclusions, the more valuable the diamond. Here is an illustration that shows the clarity grading scale that has been established by the world's foremost authority on diamonds, the Gemological Institute of America (GIA).

An important aspect of diamonds is their clarity. Before buying a diamond you should make efforts to learn all about grading the clarity of a diamond. This process is very easy to learn. The two things that you need to understand. There are two types of diamonds, namely those with inclusions or blemishes, and those that are without blemishes that can be seen with the naked eye. The clarity of diamonds can be further sub-divided into various categories.

Many people believe the misconception that diamond clarity implies the clarity of the diamond. This is actually not the case. Clarity is used to indicate the internal and external imperfections of the diamond. The most superior quality diamonds will have the grade of FL or IF – Flawless or Internally Flawless – which means that it is perfect. On the other hand, a grade of I-1, I-2 or I-3 implies that the diamond is imperfect, with a grade of I-3 being the worst.

There are other types of grades such as VVS1 and VVS2, which indicate that the diamonds may be slightly imperfect; VS1 and VS2 indicate that the diamond is very slightly imperfect; SI-1 and SI-2 indicate that the diamond is slightly imperfect.