Identify and document stones' clarity characteristics, using plot diagrams.
Advise customers and others on the best use of gems to create attractive jewelry items.
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.
Immerse stones in prescribed chemical solutions to determine specific gravities and key properties of gemstones or substitutes.
Hold stones, gems, dies, or styluses against rotating plates, wheels, saws, or slitters to cut, shape, slit, grind, or polish them.
Sort rough diamonds into categories based on shape, size, color, and quality.