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 • DIAMOND GRADING
• IDEAL PROPORTIONS
• READING DIAMOND CERTIFICATES
• POPULAR DIAMOND SHAPES
IDEAL DIAMOND PROPORTIONS
What is the ideal diamond cut?
The ideal cut is a mathematical formula for cutting diamonds to precise angles and proportions to gain the optimum reflection and refraction of light.
You may choose to compromise on color, clarity or carat-weight, but to ensure that you have the most brilliant possible diamond, you should never compromise on cut.
All diamonds have some brilliance, but an ideal cut diamond will offer the maximum play of light and sparkle.
When you buy a non-ideal cut diamond it will be cut to retain the maximum weight from the original piece of rough diamond. The extra depth or thickness of a non-ideal cut diamond may increase the carat weight of the diamond but the play of light and sparkle reduced.
The diamgram below shows how light, coming in from the human eyes perspective, refracts within the diamond and then exits according to the cut of the crown.
 The goal of the expert diamond cutter is to fashion a diamond that produces the most satisfying return of light to the eye within a pleasing symmetrical shape. All the while, the cutter is balancing the goal of attaining maximum brilliance and symmetry against the inevitable loss of weight necessitated by the very process of cutting.
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