Branch of lapidary art involving the five basic steps in fashioning a diamond: marking, cleaving, sawing, girdling, and faceting. The most popular style is the brilliant cut, a round stone with 58 facets; a round diamond with only 18 facets is known as a single cut. Any other style is known as a fancy cut. See also gemstone.
This entry comes from Encyclopædia Britannica Concise.
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