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Polish refers to how smooth the facets of a diamond have been polished by the polishing wheel. Polish influences how well light is able to pass through a diamond and is very important to a diamond's brilliance. It is highly recommended that one select a diamond that is laboratory certified with a Good (G), Very Good (VG), Excellent (EX) or Ideal (ID) polish. Diamonds that have Fair (F) or Poor (P) polish are less brilliant because they have microscopic polish lines that blur the surface of the diamond. These polish lines reduce the amount of light that enters or exits a diamond.

Polish Grades

ID = Ideal
EX = Excellent
VG = Very Good
G = Good
F = Fair
P = Poor