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Home > Education > CutCut
Of the 4Cs, a diamond's cut has the greatest influence on its brilliance, sparkle and fire. Cut not only refers to the shape of a diamond, but most importantly to its proportions, symmetry and polish. The two main factors governing brilliance are the diameter and depth of a diamond. In a well-proportioned and symmetrical diamond, light will enter and exit through the crown to the eye. A poorly cut diamond, however, allows too much light to escape through the sides and bottom. As a result, a diamond with a poor cut will appear dull, even if it has good color and clarity, and won’t have the brilliance and sparkle that it should.

All diamonds have five basic parts. The table is the uppermost facet, or the flat surface on the top of the diamond. The crown is the section of facets between the table and the midsection of the diamond. The girdle is the horizontal midsection and widest part of the diamond. The pavilion is the section of facets between the girdle and the bottom tip of the diamond. The culet is the bottom tip of the stone. A traditional round brilliant cut diamond consists of 58 facets, 33 in the crown and 25 in the pavilion.