Polish Marks (PM)
Also known as "Wheel Marks," whitish film on the surface of a facet caused by excessive heat during polishing.
Scratch (S)
A fine whitish line that can be curved or straight.
Polish Marks
Polish Marks are burnt areas on the surface of the stone caused by too much Polishing.
Rough Girdle ...
Polish Mark: Surface clouding caused by excessive heat (also called burn mark, or burned facet), or uneven polished surface resulting from structural irregularities.
polish mark If the cutter polishes in a position that is not perpendicular to the grain there will most likely be polish marks on the surface.
Polish Mark
A "burn mark", and area of slight cloudiness on the surface of a diamond caused by allowing it to become too hot when grinding or polishing it.
Portuguese Blue ...
Polish mark
Marks in the form of white cloudy areas left on the diamond due to application of high degree of heat or because of an uneven diamond surface.
Princess cut ...
Such things as extra facets, "naturals", and polish marks are also included in clarity grading. Clarity grading is a very relative practice; no masters are used and the grader relies heavily on training and experience.
Term used in the GIA clarity-grading system for any nick, scratch, abrasion, pit, polish mark, graining or polish line on the surface of a polished diamond.
Brilliance ...
For diamonds with clarity grades of I1 or lower, even a polish grade of Fair is acceptable, since these diamonds already possess internal inclusions that are visible to the naked eye, making any polish markings less relevant.
 See also: Diamond, Clarity, Cut, Polish, Eye
  
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