Hi slaws, I am not sure if in the 80is laser technology existed.
Well of course diamond , say, polisher. There are many ''old
diamonds'' which we the mortal souls can't afford. The old rich
could not show off with expensive cars or yachts but well with
jewels. The most talented diamond polisher were used for such
jobs like Michelangelo for church paintings. They were regarded
as simple workman then but become ''artist'' later.