Polishing marks
Almost every cut diamond shows polishing marks, but they are mostly so fine that they can only be seen with difficulty.
Polishing Mark - A groove or a scratch left by the lap on a facet of a diamond or other gemstone.
There should be as few polishing marks as possible and the surface should appear glossy and reflective. Good polishing helps maximize brilliance and scintillation in trilliants.
Polish features largely describe the condition of the surface of the stone, and include abrasions of the facet junctions and the culet, rough and bearded girdles, nicks and pits, and scratches and polishing marks if they do not affect the clarity ...
Facets do not meet at a point
Misshapen facets
Rounded facet junctions
Poor polish (obvious polishing marks or scratches) ...
 See also: Polishing, Shape, Diamond, Crown, Culet
  
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