Diamond Table Size - is the length of the table of a diamond located at the top in the crown of a round brilliant diamond.
Girdle Thickness - is the thickness of the girdle, located at the side of the diamond where the upper girdle facets and lower girdle facets meet.
Crown Height - the measurement from the girdle to the table of the diamond.
Pavilion Depth - the measurement from the girdle to the culet (bottom tip of the diamond) of the diamond.
Total Depth - Crown Height plus the Pavilion Depth
Crown Angle - is the angle of the crown relative to the girdle.
Pavilion Angle - is the angle of the pavilion relative to the girdle.
Culet - bottom tip of a diamond.
Star Length - the length of the star facet located at the crown.
Half Facet Length - length of the pavilion facet.