Ok, now you might be looking at the clarity scale thinking “what do all those letters and numbers mean???" Don’t worry, it’s just looks complicated, difficult and boring. I can guarantee you that after few minutes, you will not think this way, anymore. The scale is rather simple, it starts from the highest clarity grade FL (Flawless) and it ends with the lowest grade of I3. The higher the clarity grade is – the rarer and the higher the price of the diamond. The scale is rather simple.