The golden rule is to choose excellent ideal cut diamonds to achieve superb sparkle.
Excellent cut diamond.
For superior brilliance choose a diamond with a cut grade of very good or excellent for round diamonds and good or better in fancy shape diamonds.
It also means that the diamond will sell at a premium.
When choosing a diamond in this range make sure its symmetry and polish are very good or excellent so that the impact of the above average cut is not obscured.
That said i would advise you to go for a very good symmetry grade.
The ratios and sizes of the diamond s depth width and table symmetry.
Super ideal cut diamonds have cuts with an extremely high degree of precision and angles that give them superior performance.
And a diamond with an excellent cut has to have excellent or at least very good symmetry as well.
Very good diamond cut characteristics.
The main factors impacting diamond cut quality are.
When viewed from the top the light passing through such stones creates a beautiful and clear pattern of bright and dark spots.
Excellent diamond cut characteristics diamonds with an excellent cut grade have proportions and symmetry that allow showing maximum brilliance fire and sparkle.
A perfect cut diamond is proportioned in such a way that nearly all the light that enters the diamond gets returned to the viewer s eye.
The cut quality of a super ideal cut diamond goes above and beyond that of the gia s excellent and ags s ideal grades.
Conversely a well cut diamond can have a slightly lower color g h or clarity si1 si2 and still look quite beautiful due to its superior ability to create sparkle and brilliance.