AGS Ideal 0: Diamond rated by AGS as having ideal polish, symmetry, proportions and visual performance. This grade can only be assigned by the AGS Laboratory.
Rpt: Which independent gemological laboratory graded the diamond.
CGL: Central Gemological Laboratory – Japan / Antwerp
Clarity: The clarity grade of the diamond listed.
Color: The color grade of the diamond.
Consultation: Not a full report, specifies the characteristics of the diamond, but lacks a plotting diagram of the inclusions.
Crown: Crown angle measurement in degrees.
Cul: Culet size (bottom point of diamond).
Cut: Proportions rating as determined by Sarin Analysis.
Dpth: Total Depth measurement of the diamond in percent (%)
Dossier: Consultation style report issued by the GIA for diamonds weighing less than 1.00 carats, describes the characteristics of the diamond, but does not contain a plotting diagram representing the inclusions.
DQD: Abbreviation for AGS Diamond Quality Document (full report).
EGL: European Gemological Laboratory
EX: Excellent (highest rating available from GIA).
F – Girdle: refers to a faceted girdle.
FB: Faint blue fluorescence.
Flr: The fluorescence rating of the diamond.
FT: Faint fluorescence (usually blue)
GIA: Gemological Institute of America – Gem Trade Laboratory (GIA-GTL)
GIA-DD: GIA Diamond Dossier (passport size report). Girdle edge is laser inscribed with GIA Diamond Grading Report number.
GIA-XXX: Diamond graded by the GIA as having an Excellent Overall Cut Grade (highest rating available from GIA).