A certificate is a diamond grading report issued by an independent laboratory detailing the diamond’s weight, dimensions, color, clarity and cut. The GIA (Gemological Institute of America) whose standards are the strictest in the diamond industry, are the undisputed international authorities on diamond grading and gem identification. Other laboratories may not be as strict with the grading of your diamond, and we will require our independent assessment before an offer can be made. The GIA issues a Diamond Grading Report or Diamond Dossier. The EGL calls their report a Diamond Certificate.