Parameters, Assumptions And Naming Conventions Worksheet

Emerald Cut Geometry -

Parameters, Assumptions and Naming Conventions

Emerald Cut Shape

There are two parameters which determine the overall shape.

Parameters:

1) Length-to-Width Ratio

2) Corner Ratio Percentage

Emerald Cut Crown

Emerald cuts have crowns containing 3 tiers of facets.

The Emerald cut crown is defined by 1 assumption and 4 parameters.

Assumption:

1) In a bird’s eye view, the widths of all three crown tiers or step facets are equal.

Parameters:

1) Table diameter percentage

2) Crown angle 1

3) Crown angle 2

4) Crown angle 3

Emerald Cut Girdle

The girdle is defined by 1 parameter:

Parameter:

1) Girdle thickness percentage = girdle thickness divided by stone width.

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