Fabricates, finishes, and evaluates the quality of gems and diamonds used in jewelry or industrial tools.
This career is part of the Manufacturing cluster Manufacturing Production pathway.
A person in this career:
- Examines gems during processing to ensure accuracy of angles and positions of cuts or bores, using magnifying glasses, loupes, or shadowgraphs.
- Assigns polish, symmetry, and clarity grades to stones, according to established grading systems.
- Estimates wholesale and retail value of gems, following pricing guides, market fluctuations, and other relevant economic factors.
- Examines gem surfaces and internal structures, using polariscopes, refractometers, microscopes, and other optical instruments, to differentiate between stones, to identify rare specimens, or to detect flaws, defects, or peculiarities affecting gem values.
- Identifies and documents stones' clarity characteristics, using plot diagrams.
- Advises customers and others on the best use of gems to create attractive jewelry items.
- Examines diamonds or gems to ascertain the shape, cut, and width of cut stones, or to select the cuts that will result in the biggest, best quality stones.
- Immerses stones in prescribed chemical solutions to determine specific gravities and key properties of gemstones or substitutes.
- Holds stones, gems, dies, or styluses against rotating plates, wheels, saws, or slitters in order to cut, shape, slit, grind, or polish them.
- Sorts rough diamonds into categories based on shape, size, color, and quality.
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