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Examines gemstones, such as jade, sapphires, and rubies, to
evaluate their genuineness, quality, and value, utilizing
knowledge of gems and market valuations: Examines gem surfaces
and internal structure, uisng polariscope, refractometer,
microscope, and other optical instruments, to differentiate
between stones, identify rare specimens, or to detect flaws,
defects, or peculiarities affecting gem values.
Immerses stones
in prescribed chemical solutions to determine specific gravities
and key houses of gemstones or substitutes, which idnicate
physical characteristics of stone for gem identification,
quality determination, and for appraisal. Grades stones for
color, perfection, and quality of cut. Estimates wholesale and
reatil value of gems, following pricing guides, market
fluctuations, and various economic changes that affect
distribution of precious stones.
May advise customers and others
in use of gems to create attractive jewelry items.
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