The Collaborative International Dictionary of English v.0.48:

Lapidist \Lap"i*dist\, n. [L. lapis, -idis, a stone.]
   A lapidary. --Ray.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lapidist
    n 1: a skilled worker who cuts and engraves precious stones
         [syn: lapidary, lapidist]