Understanding Diamond Anatomy

Facet

Any of the flat "sides" of the Diamond

Table

On a brilliant cut stone, the top octagonal facet

Girdle

The typically frosty white ring at the widest part

Culet

The bottom point (actually a facet) on a brilliant cut stone

Pavilion

The bottom of the stone below the girdle

Crown

The portion of the stone below the girdle

Diameter

Width of the diamond as measured through the girdle

Fire

The quality of the diamond that breaks reflected light into a colourful array

Depth

Height of gemstone from culet to table

Brilliance

The quality of the diamond that reflects light without changing it (also called sparkle)

Fluorescence

The characteristic of some diamonds to fluoresce certain colours under some light

Natural

Usually found on the girdle. A small section was on the side of the raw diamond. It appears as a slightly rough flat spot on the girdle.

Feather

A "crack" in a diamond appears as a white feather within the stone.