Diamond Carat Weight refers specifically to a diamond’s weight. A metric carat is defined as 200 milligrams. Oftentimes, one will hear diamond carat weight referred to as “points.” One carat is divided into 100 points in order to allow for very precise one hundredth decimal measurement of each carat.
While this is an exact measure of size, it does not always accurately show a diamond’s size to the eye. This is because you a view a diamond from the top looking down and into the stone. The diamond’s dimensions, measurement across the top in millimeters and finally the diamond’s cut and quality will thus play a part in the size when viewed to the naked eye. When a diamond is well cut, the light and sparkle seen in the diamond is maximized and this extra light will make the diamond appear larger. For example, a diamond with a lower cut grade could appear smaller due to its dimensions or in combination with the amount of light that does or does not shine brightly through the top (also known as the table).