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Diamonds and Diamond Grading 15
Grading Proportions-Pavilion and Culet-and Evaluating Finish
8
Geology
Post-Graduate
11/01/2018

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Cards

Term
Craftsmanship
Definition
the care that goes into the fashioning of a polished diamond, as confirmed by its finish
Term
Culet Size
Definition
the size of the facet at the bottom of the diamond where the pavilion mains meet
Term
Design
Definition
a diamond's physical shape, including its proportions and durability, determined by decisions made during the fashioning process
Term
Finish
Definition
the quality of the polish and precision of the cut of a fashioned gemstone
Term
Girdle Thickness Percentage
Definition
girdle thickness expressed as a percentage of average girdle diameter
Term
Lower Girdle Facet Percentage
Definition
the length of the lower girdle facets expressed as a percentage of the total distance between the girdle and the culet
Term
Pavilion Angle
Definition
the angle formed by the pavilion mains and the girdle plane
Term
Pavilion Depth Percentage
Definition
the distance from the girdle plane to the culet, expressed as a percentage of average girdle diameter
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