The 4C's determine the value of a diamond...

CUT

Not to be confused with the shape of the diamond, cut refers to the arrangement of a diamond's facets. Cut is the most important of the 4C's because it determines the optimum combination of brilliance, dispersion and scintillation. This combination has the greatest effect on a diamond's beauty. Cut is the only "C" under man's control. A diamond which is "ideal cut" captures and releases the maximum play of light.

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