Cut (gems)

When a gemstone is desired to be used in jewelry, it is cut depending on the size and shape of the rough stone, as well as the desired piece of jewelry to be made. As a general rule, a cut gemstone will reduce the mass (described in the carat) by about 50 percent.

See also: Diamond cut

There are several techniques available to work with gemstones; among them are sawing, grinding, sanding, lapping, polishing, grilling, and tumbling. The diamond cut planning stage is a complex process that requires the cutter to work with unique rough stones. Very often, the location of the inclusions in a rough stone will determine the type of shape to which a diamond may be cut. For economic reasons, most diamonds are cut to retain weight instead of maximizing brilliance.[1]

Types
Cut emeralds
Princess cut diamond set in a ring

A list of cuts:

  • Antwerp rose cut
  • Asscher cut
  • Baguette cut
  • Barion cut
  • Brilliant cut
  • Briolette
  • Cabochon
  • Ceylon cut
  • Cushion or old mine cut
  • Double Dutch rose cut
  • Emerald cut
  • Flanders cut
  • French cut
  • Heart brilliant
  • India cut
  • King brilliant
  • Kite brilliant
  • Lozenge cut
  • Magna brilliant
  • Marquise or navette cut
  • Mogul cut
  • Obus cut
  • Oval brilliant
  • Pear or drop brilliant
  • Pendeloque cut
  • Princess cut
  • Radiant cut
  • Rose or rosette cut
  • Round brilliant
  • Single or eight cut
  • Square emerald
  • Star brilliant
  • Step cut
  • Transitional cut
  • Trapezoid or trapeze cut
  • Trilliant cut, a.k.a. trillian or triangle cut
  • Whirl cut
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See also
  • Cut styles

References
  1. "Why Aren't All Diamonds Cut to Ideal Proportions". Online Diamond Buying Guide. Retrieved 7 January 2011.
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