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Learn About Diamonds - Cut
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Cut
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Modern Ideal
Index of Terms
Girdle & Culet
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5th C
Index of Terms

Below you will find the numbers for an ideal cut round diamond as proposed by Marcel Tolkowski in 1919. These mathematical calculations would, in principle, give the maximum balance between brilliance, the ability to reflect back all the light coming into the diamond, and enhance the ability of the diamond to break light into the prismatic colors that make it so beautiful.

Move your mouse over each term to see it's location in the image.
Girdle Diameter
Table
Crown Height
Crown Angle
Facets
Girdle
Depth
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Pavilion Angle
Culet

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