by Pirard » May 5, 2015 Wouldn't there be two drill holes on some gem grade pearls? If they are strung on a necklace vs. being set on a post? And a silly question, but would a pearl with lack-luster but free of blemishes be considered gem grade? And does shape impact "gem grade"? For instance, would an off round with no blemish (undrilled as well) great color and high luster be considered gem grade? I guess I'm asking because I've never really heard the term used in a way to describe pearls. Thanks...and apologies for the stupid questions!!