The most important characteristic of a diamond is the cut. A diamond’s brilliance and beauty is determined by the way it is cut. Ultimately, the better the cut, the more sparkle a diamond will have.
The colour grade of a diamond refers to its lack of colour. Diamonds that contain little or no colour are higher up on the colour scale than those that have a visible colour. The highest possible colour on the colour scale is a D, the lowest being a Z. The colour of a diamond is usually considered the second most important aspect, after the cut. This is because the human eye tends to see a diamond sparkle first followed by the colour.
Almost all diamonds have small imperfections. The highest clarity grades are given to diamonds that have few or no imperfections. A diamond’s clarity is measured by the amount and size of the small imperfections that occur in majority of diamonds. A lot of the imperfections in a diamond are microscopic and generally do not affect the beauty of a diamond in any obvious way.
Carat is the measure of a diamond’s weight and does not necessarily refer to its size. When determining a diamond’s size, it is viewed from the top, as this is generally how diamonds are presented and set in a ring. When determining the size of a diamond, the carat weight is taken into consideration in conjunction with its cut grade and its distance in millimetres across the top.