EGL Diamond Certification

The European Gemological Laboratory (EGL) was founded in Belgium more than 30 years ago. The EGL is committed to protecting the integrity of the jewelry trade and fueling public interest through applied science, innovation, education, and exceptional service.

Brief History of EGL

The EGL is accredited with introducing new approaches to diamond grading, the practice of certifying diamonds measuring less than one carat, and establishing the 'SI3' designation for diamond clarity. The organization is also recognized for conducting advanced research with renowned physicists, geologists, and mineralogists.

Learn more about the diamond reports issued by the EGL below.

SHOP EGL DIAMONDS

EGL Diamond Grading Standards

Before grading a diamond, the EGL thoroughly scrutinizes every facet and detail of the stone. Each diamond is inspected by at least eight expert gemologists. If the judgment of a diamond is not unanimous, senior gemologists further analyze the stone before a grade is assigned.

Diamond Carat: Carat weight is measured using calibrated electronic scales. The diamond's proportions, measurements, and facet angles are recorded.
Diamond Color: A diamond's color is assessed by a specialized team of gemologists by comparing it to master stones of predetermined color. Specially calibrated lighting is used to illuminate the diamond during analysis.
Diamond Clarity: The clarity of a stone is determined by a specialized team of experienced gemologists. Each gemologist independently examines the diamond using a microscope with a minimum of 60x magnification to identify characteristics of clarity and finish. If any inclusions are detected, they are plotted on a diamond diagram.
Polish & Symmetry: Polish and symmetry are evaluated based on a careful inspection of the quality of a diamond's finish and cut.
Diamond Fluorescence: The diamond is exposed to long-wave ultraviolet radiation to check for the presence of any amount of fluorescence.

EGL Diamond Grading Report

The EGL Diamond Grading Report includes the color, clarity, carat weight, and cut of a diamond. A detailed diagram is used to plot the diamond's proportions and to show any inclusions that are discovered.

EGL Diamond Consultation

An EGL Diamond Consultation includes the information noted on the Grading Report, including shape, carat weight, color, clarity, and measurements, as well as a plotting diagram, in a convenient, pocket-sized document.

EGL vs. GIA Certification

Although both the EGL and the GIA are internationally reputed gemological laboratories, the GIA has become known for its stricter grading standards when compared to those of the EGL.