"New" chips should "[appear] not to have been used in games; square and round edge chips will be as from the manufacturer with absolutely no wear, no dings or nicks; no scratches on surface of chip or inlay" according to the club...

Obviously, some chips start out with rounded edges (Chipcos), but for clays that start with square edges, a rounded edge is not "as from the manufacturer" and therefore shouldn't be "New".

JMHO.