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The Brilliance & Performance of the Diamond

Cut Scale GIACut is a measure of a diamond’s appearance, the combination of brightness, fire and scintillation. Cut also encompasses the craftsmanship of polish and symmetry.

Polish is the quality of a diamond’s surface condition.

Symmetry refers to the exactness of the shape of a diamond and the symmetrical arrangement and placement of the facets.

The GIA Cut Scale ranges from Excellent to Poor.

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GIA provides a cut quality grade for standard round brilliant diamonds that fall into the GIA D-to-Z color range.

A polished diamond’s beauty lies in its complex relationship with light: how light strikes the surface, how much enters the diamond, and how, and in what form, light returns to your eye.

The result is a magnificent display of three attributes:

  • Brightness is the combination of all white light reflecting from the surface and interior or a diamond.
  • Fire describes the “flares” of color emitted from a diamond.
  • Scintillation describes the flashes of light you see when the diamond, the light, or the observer moves.