Diamonds...Here comes the science bit..

The 4C's of Diamonds

• The cut of a diamond refers to its proportions. It is one of the most important factors to be considered while choosing your diamond. It is an aspect which is directly influenced by man. The other three are influenced totally by nature.
• The cut of a diamond should not be confused with its shape. Shapes are cut from the original rough diamond, and whatever the shape, a well-cut diamond is always better able to reflect light.
• Diamonds are usually cut with 58 facets, or separate flat surfaces. These facets are placed at precise angles to each other. This relationship is designed to maximize the amount of light reflected through the diamond and to increase its beauty.
• Rough stones can be cut to their maximum weight and monetary value but loses some "brilliance and "sparkle". Similarly rough stones can also be cut into the most beautiful stone, despite heavy weight loss and lowered monetary value.