While inclusions usually cannot be seen, their presence reduces the price because the diamonds are more readily available. These are any of the impurities that are on the surface of the diamond. External flaws are the result of wear and tear on the diamond or from damage caused during cutting. These are any of the many impurities that reside solely in the interior of the diamond. There are many kinds of internal flaws.
Clouds are microscopic inclusions that lower transparency.
The majority of imperfections in diamonds are the result of breakage or fractures, in the diamond chemical structure. The price of a diamond will always rise proportionately to the size of the stone. Large diamonds are rare and have a greater value per carat. The best resource to help you ensure that you are getting your money's worthies the certificate you get when you purchase ad diamond. In certificates, as in appraisals and receipts, a diamond's weight is clearly written in carats.