The cut of a diamond is the overall appearance.  If the diamond is pleasing to the eye, the probabilities are it has very good angles, good facet junctions, and very nice finish or polish. The better the diamond has been cut the better the make, thus the more beautiful the diamond will appear.

This cutting process is the human factor and there is a wide range of expertise in the world.  Some of the diamond cutting centers in the world are New York, Antwerp, Africa, and India.

Light travels best, reflecting and refracting, in the third diagram.  it has the best dimensions, angles, and finish so it exits through the top of the diamond as sparkle (brilliance, scintillation, and dispersion).  The other diamonds lose that sparkle through their undersides.

To determine the cut grade of the standard round brilliant diamond – the shape that dominates the majority of diamond jewelry – GIA calculates the proportions of those facets that influence the diamond’s face-up appearance. These proportions allow GIA to evaluate how successfully a diamond interacts with light to create desirable visual effects such as:


Internal and external white light reflected from a diamond


The scattering of white light into all the colors of the rainbow


The amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond.


The clarity of a diamond is the measurement and location of inclusions or flaws within the diamond.


The carat measurement of a diamond is often confused with the size of the diamond, when in reality it is the weight.


The color of a diamond ranges from colorless to specific fancy colors. Including Pink, Blue, Red, and Green.


The better the diamond has been cut the better the make, thus the more beautiful the diamond will appear.

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