Prospector

·noun One who prospects; especially, one who explores a region for minerals and precious metals.

prospector
prospector, ōris, m. [prospicio]. I Lit., one who looks out : sicut prospector videns casum proxim...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
prospector
n. one who searches for gold on anew field. See Prospect, v. 1890. `Goldfields of Victoria,' p. 19...

Dictionary of Australasian Words Phrases and Usages by Edward E. Morris