Hello Julia Re: "rub-over" The wordings for "rub-over" I believe is
just another name for "gypsy setting" or "flush setting". This when
the stone/diamond is recessed into a hole and the walls of the metal
have been "rubbed over". In Canada, we call it "Gypsy-Set", eh! But
the clincher is when the stone has been recessed lower than the
surrounding metal and the walls have been under-cut to facilitate
this maneuver, comprenez-vous? with the aid of a reciprocating hammer
or a soft metal pushing hand-tool, brass or copper! With metal, there
would be chance for damaging the stone, as in breaking the facets.
The end "clean-up" would be with the aid of a pumice wheel and the
marks of pressing would then be rubbed clean. Then the inside wall
would then be bright-cut to keep the spherical shape of the stone
that was just set. "Gerry, the cyber-setter !"