Cut is the most important factor of the four C’s, and refers to the angles and proportions of the diamonds facets. Cut is the only factor which dramatically affects the sparkle and scintillation. The better the cut the more the diamond will sparkle. It is also the only factor that man has any control over.
Based on scientific formulas, a diamond that is cut to ideal proportions will reflect light from one facet to another and then disperse it through the top of the stone. The light refracted externally will amplify and disperse the refracted light from within to provide a myriad of colours and an even concentration of light, brilliance and lustre.
Diamonds that are cut too deep or too shallow lose or leak light through the side or bottom, resulting in less brilliance and ultimately, value. Cut also refers to shape-round, square, pear, or heart for example. Since a round diamond is symmetrical and capable of reflecting nearly all the light that enters, it is the most brilliant of all diamond shapes and follows specific proportional guidelines.
The impact a diamonds cut has on price depends on a few factors. One of the factors is the amount of rough that is used to end up with the finished diamond. Diamonds that use more of the rough are more expensive such as the round brilliant cut diamond, whereas diamonds which use less rough like the princess, cushion and other fancy cuts are less expensive.
Secondly diamonds cut by master cutters in certain countries also carry a premium. For example a master cutter from Russian, cutting a premium cut princess cut diamond like the Passion8 princess will cost a little more than a regular cutter from Belgium. The end result is a diamond that sparkles more, as he sacrifices more of the rough weight to end up with a slightly smaller but more beautiful diamond.
At Xennox Diamond World, cut is our passion, and something that we never compromise on. Come and see the difference premium cut diamonds can make to your sparkle. Click here to see how the GIA grade diamonds.