The cut refers to man-made proportions and finish of a polished diamond. It is considered to be the most important characteristic, which ultimately determines the diamond's light performance (sparkle).
In general, a properly cut diamond returns the light out of its top surface (table). A cut that is too shallow or too deep, causes the light to “leak” out of the bottom or the side, respectively.
Cut grades listed by OroSpot correspond with those used by the Gemological Institute of America (GIA) or the American Gem Society Laboratories (AGSL), if available. Some diamonds evaluated by GIA before January 1st, 2006 do not have the cut grading. In such cases, OroSpot uses default criteria to determine brilliance based on standard depth and table measurements.
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This rare cut reflects almost all light that enters the diamond. The ideal grade applies only to 3% of diamonds rated according to this scale.
Very good cut
Reflects almost as much light as the ideal cut, but is more affordable. Represents the top 15% of diamonds rated according to the cut grading scale.
Reflects most light, but costs significantly less than the higher graded diamonds. Represents the top 25% of diamonds rated according to the cut grading scale.
This cut is less brilliant, and it represents the top 35% of diamonds rated according to the cut grading scale.
This grade applies to diamonds that lose most of the light, because they are too deep and narrow or too shallow and wide .