The distance between the table (top) and the culet (bottom) of a diamond or gemstone as measured in millimetres.
Diamond grading report
A formal document detailing a diamond’s unique characteristics, especially it’s cut, carat weight, colour and clarity, and may also include its finish (polish and symmetry), fluorescence and additional comments. A diamond grading report is issued by an independent laboratory such as the GIA - Gemological Institute of America. These reports are numbered and are unique to each and every diamond graded.
The display of spectral colours emanating from a diamond as white light is broken-up when it enters the diamond.