The beauty of an individual diamond depends on cut more than anything else and is the most important characteristic out of the 4 Cs.
Diamond cutting is a highly delicate process that prizes skill, scientific knowledge and experience.
To understand diamond cut, it is necessary to know the structure of a diamond and how this affects the movement of light through the stone.
Figure 1. The Anatomy of a Diamond
Table: The largest facet at the top
A diamond is comprised of two main sections, the Crown and the Pavilion. Their structure and relationship together in the form of table and depth percentages are the major influencers in a diamond's sparkle. When a diamond is well cut, light enters and returns out of the top of the diamond. However, if the cut is too deep, light escapes out of the side; too shallow and it leaks out of the bottom.
The GIA employs a five-point scale for grading diamond cut, ranging from excellent and very good, to good, fair and poor. Excellent cut grades are awarded to diamonds with the highest level of sparkle intensity, while Fair and Poor grades indicate poorer light reflection and therefore less sparkle.
Eight & Diamond only works with manufacturers that meet the very high standards we aim to provide to our customers. Their proven, exacting craftsmanship ensures that no unnecessary brilliance is lost in a diamond under any circumstances.