The correct option is B Lapidist
Option A: A lapidist refers to people who are skilled at cutting and polishing precious stones. The given description means the same, hence option A is correct.
Option B: A philatelist is a person who collects and studies stamps.
Option C: An oculist is an optician or an ophthalmologist (a doctor who treats eye diseases).
Option D: A drover is a person who carries cattle and other livestock to the market.
These words are not related to precious stones, hence options B, C and D are incorrect.