The Diamonds Polish
Excellent or Ideal polish is critical in achieving clear dispersion, sharp scintillation and maximum brilliance. It takes time to polish the facet to a bright and smooth finish.
Just as minute scratches can dull a glass surface, a poor polish on a diamond can reduce the brightness of its sparkle.
The Diamonds Symmetry (external)
The light performance of a diamond depends on the cutter’s decision on the angles and placement of the facets and the skill to place those facets at precise angles.
We’ve reviewed the internal symmetry with the hearts and arrows diagram. This symmetry refers to the external symmetry – how well the facets come to a point around the intersection of the diamond’s facets.
Mis-aligned facets cause light loss.