Understanding how to mark the clarity of a diamond doesn’t involve much effort. Fundementally there are two issues you must comprehend: Diamonds that have visual inclusions & blemishes, and diamonds that are “eye clean” and don’t have inclusions or blemishes that a human eye can notice.

Starting of that point the clarity of a diamond can be defined by several subcategories. Many of those who are interested in diamonds incorrectly think that a diamond clarity regards to how clear the diamond is. But that’s not how it is.

In reality clarity regards the internal & external defects of a diamond. The most excellent diamonds are marked with a grade of FL or IF, Flawless or Internally Flawless, saying that the diamond is perfect. A mark of of I-1, I-2 or I-3 signifies that the diamond is imperfect, and a mark of I-3 signifies the worst.

Additional marks are VVS1 and VVS2, which signifies that the diamond is very, very slightly imperfect; VS1 and VS2, which state the diamond is very slightly imperfect. And last but not least: SI-1 & SI-2, which signifies that the diamond is somewhat imperfect.