CLARITY
Clarity in a diamond is defined as its freedom from inclusions also known as clarity characteristics. Grades are based on how visible the characteristics are and how they affect its appearance and durability, and range from Flawless to Included. The higher the clarity (or the less "stuff" inside the diamond), the more rare and the more expensive. In a diamond with a clarity grade of SI2 or better, you will usually not be able to see anything inside the diamond with your naked eye (not using magnification).
When it comes to clarity, all Hearts On Fire diamonds are strictly limited to the FL (flawless) to the SI2 (slight inclusion) range – the most valuable and rare diamond range. In addition, Hearts On Fire serialized diamonds in complete engagement rings use two quality categories: Sensational and Exceptional.