Clarity refers to the presence of inclusions in a diamond. Inclusions are natural identifying characteristics such as minerals or fractures which appear while diamonds are being formed in the earth.
The number, size and location of inclusions can disrupt the flow of light through a diamond and as a result may diminish the brilliance or sparkle of a diamond. Therefore, the fewer the inclusions, the greater the clarity, the rarer and more valuable the diamond.
Diamonds are graded on a scale ranging from flawless to imperfect based on the inclusions in the diamond. The most widely used system for grading a diamond's clarity was developed by the GIA (Gemological Institute of America). Each grade and description was developed so that trained gemologists all over the world working with a ten-power magnification could all give a diamond the same grade
FI - Flawless : No blemishes or inclusions- Ordinary wear could cause a flawless diamond to lose its flawless status, and therefore they are rarely used in jewellery.
IF - Internally Flawless : No inclusions and only insignificant blemishes - Diamonds, with no inclusions and only tiny scratches or pits that can be removed by repolishing, are classified as IF.