cutThe cut of a diamond has the most effect on the stone’s beauty and brilliance. Quality varies, from excellent to poor, depending on the skill of the craftsman.
colourThe colour of a diamond can significantly affect its value. The clearer a stone appears, the rarer it is. Quality varies ranging from D to Z in descending order.
clarityExperts will look at the presence and location of inclusions (crystals of diamonds or other minerals contained in the stone) and defects (very slight surface markings) to determine the clarity grade of a diamond. The scale ranges from Flawless to Included.
caratThe weight of a diamond is expressed in carats, one carat equalling 0.2 grams or 100 points. The word carat came into being as a derivation of the word carob, as carob seeds, weighing one-fifth of a gram, were used to counterbalance the scales of gem traders in ancient times.