One who cuts precious stones
A). Philatelist
B). Drover
C). Lapidist
D). Oculist
Lapidist
One word substitute is Lapidist.
Philatelist: person who "loves stamps."
Drover: someone whose job is to make sheep or cattle move from one place to another in groups.
Lapidist: a skilled worker who cuts and engraves precious stones.
Oculist: an ophthalmologist or optician.