Cut

DIAMOND CUT

Rather than describing the shape  of a stone, cut refers to the proportion, symmetry brilliance and polish of a diamond. This means that the diamond cutter has taken into account the inherent characteristics of each individual stone and chose the best way to shape it to accentuate its beauty.

It is very essential to know Diamond Anatomy before understanding Cut.

Diamond Anatomy

Diamond_Anatomy

  • Diameter: Width of a diamond measured through the Girdle.
  • Table: Largest facet of a gemstone.
  • Crown: Top portion of a diamond extending from the Girdle to the Table.
  • Girdle: Intersection of the Crown and Pavilion which defines the perimeter of the diamond.
  • Pavilion: Bottom portion of a diamond, extending from the Girdle to the Culet.
  • Culet: Facet at the tip of a gemstone. The preferred Culet is not visible with an unaided eye (graded “none” or “small”).
  • Depth: Height of a gemstone measured from the Culet to the Table.

A diamond gets its brilliance and scintillation by the cutting and polishing of its facets, allowing the maximum amount of light that enters through its top to be reflected and dispersed back through the top. Cut has the following 3 components:

 

Diamond Cut by Shape

A Diamond Cut by Shape describes the outline of the stone and pattern of the facet arrangement. A stone can be cut in various Shapes like Round, Princess, Heart, Oval, Pear etc. We will understand various diamond shapes in Shape part.
Diamond Cut by Shape

 

Diamond Cut by Depth

With proper cutting (diagram 1 below) the light passes through the top, bounces off the sides, and then travels back out the top, giving the diamond optimum brilliance. If the diamond is cut too deep (diagram 2), light passes through the side of the diamond. If the diamond is cut too shallow (diagram 3), light passes through the bottom of the diamond, also inhibiting maximum brilliance.

 

Diamond Cut Diagram

A poorly cut diamond will lack the lustre and glow of its premium-cut counterparts, and for this reason, master diamond cutters will often sacrifice carat weight to improve the cut of a stone.

Diamond Polish and Symmetry

Polish and symmetry are two important aspects of the cutting process. The Diamond Polish expresses the smoothness of the diamond’s facets where as the Symmetry refers to alignment of the facets. A poor Diamond Polish, or rough facets, can diminish a diamond’s brilliance, as well as its value.

 

DIAMOND EDUCATION