The depth of a stone measured from the table to the culet. It is expressed as a percentage of the stone's diameter at the girdle.
The table percentage of a diamond is expressed as a percentage of the stone's narrow-girdle diameter. On a round brilliant, it is measured from corner to opposite corner, rather than from flat side to flat side.
The length-to-width ratio is a comparison of the length and the width of a fancy shape diamond. This ratio expresses how relatively long or wide a diamond appears when viewed from the top.
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