Examines, analyzes, and classifies minerals, gems, and precious stones...
Examines, analyzes, and classifies minerals, gems, and precious stones: Isolates specimen from ore, rocks, or matrices. Makes microscopic examination to determine shape, surface markings, and other physical characteristics. Performs physical and chemical tests and makes x-ray examinations to determine composition of specimen and type of crystalline structure. Identifies and classifies samples. Develops data and theories on mode of origin, occurrence, and possible uses of minerals.