10-22-2007, 06:45 AM
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Cut is the human contribution to a diamonds beauty, and has important effects on each of the other C’s. It can both enhance color and hide inclusions. Today’s designs are the result of hundreds of years of study and experimentation, as people sought to bring out the special beauty we prize in diamonds. Cutters also have to choose between optimum beauty and retaining maximum weight; often they compromise. In analyzing a piece of rough, the cutter must visualize its potential and plan the work to produce the most valuable combination of characteristics. Cuts can be evaluated on the basis of the above dimensions and their classification can be roughly defined as follows: The various dimensions of a diamond are defined as follows: Diamond Dimensions • Table: The largest facet of a diamond. • Crown: The section of a diamond from the girdle to the table. • Girdle: The meeting point of the crown and pavilion which determines the diamond’s perimeter. • Diameter: The width of the diamond measured with reference to the girdle. • Pavilion: The lower section of a diamond from the girdle to the culet. • Depth: The height of a diamond from the culet to the table. • Culet: The facet at the tip of a diamond. The best culet should be invisible to the naked eye (evaluated as "none" or "small"). In terms of the 4Cs, cut includes a diamond’s style and make. • Style can mean the basic pattern of the facet arrangement, the shape of the stone, or both. • Make means proportions and finish. Most diamonds have one of three basic facet arrangements: brilliant, step, or mixed. • Brilliants have facet patterns that radiate from the center of the stone towards the edge, and triangle or kite-shaped facets. • Step cuts have concentric rows of (trapezoidal) facets parallel to the girdle. • Mixed cuts have a combination of brilliant and step facets (usually the crown is cut in one style and the pavilion in another). Loose Diamonds Last edited by benifer : 01-23-2008 at 08:23 AM. 
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