Fabricate, finish, or evaluate the quality of gems and diamonds used in jewelry or industrial tools.

• Brilliandeer-Lopper
• Diamond Cleaver
• Diamond Driller
• Diamond Selector
• Diamond-Die Polisher
• Gem Cutter
• Girdler
• Jewel Blocker and Sawyer
• Jewel-Bearing Maker
• Lathe Operator
• Oliving-Machine Operator
• Phonograph-Needle-Tip Maker
• Sapphire-Stylus Grinder
• Spotter

• Advise customers and others on the best use of gems to create attractive jewelry items.
• Assign polish, symmetry, and clarity grades to stones, according to established grading systems.
• Dismantle lapping, boring, cutting, polishing, and shaping equipment and machinery in order to clean and lubricate it.
• Estimate wholesale and retail value of gems, following pricing guides, market fluctuations, and other relevant economic factors.
• Examine 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.
• Examine 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.
• Examine gems during processing to ensure accuracy of angles and positions of cuts or bores, using magnifying glasses, loupes, or shadowgraphs.
• Hold stones, gems, dies, or styluses against rotating plates, wheels, saws, or slitters in order to cut, shape, slit, grind, or polish them.
• Identify and document stones' clarity characteristics, using plot diagrams.
• Immerse stones in prescribed chemical solutions to determine specific gravities and key properties of gemstones or substitutes.
• Lap girdles on rough diamonds, using diamond girdling lathes.
• Locate and mark drilling or cutting positions on stones or dies, using diamond chips and power hand tools.
• Measure sizes of stones' bore holes and cuts to ensure adherence to specifications, using precision measuring instruments.
• Place stones in clamps on polishing machines, and polish facets of stones, using felt-covered or canvas-covered polishing wheels and polishing compounds such as tripoli and rouge.
• Regrind drill points, and advance drill cutting points according to specifications for channel depths and shapes.
• Regulate the speed of revolutions and reciprocating actions of drilling mechanisms.
• Replace, true, and sharpen blades, drills, and plates.
• Secure gems or diamonds in holders, chucks, dops, lapidary sticks, or blocks for cutting, polishing, grinding, drilling, or shaping.
• Secure stones in metal mountings, using solder.
• Select shaping wheels for tasks, and mix and apply abrasives, bort, or polishing compounds.
• Sort rough diamonds into categories based on shape, size, color, and quality.
• Split gems along pre-marked lines in order to remove imperfections, using blades and jewelers' hammers.

• cut gemstones
• examine products or work to verify conformance to specifications
• fabricate components for precision instruments
• fabricate, assemble, or disassemble manufactured products by hand
• maintain or repair industrial or related equipment/machinery
• make independent judgment in assembly procedures
• measure, weigh, or count products or materials
• operate glass or stone working equipment/machinery
• read specifications
• use hand or power tools
• use precision measuring tools or equipment