A Diamond Grading Report documents the specific characteristics of a diamond. These reports are issued by the European Gemological Laboratory USA (EGL), one of the most respected organizations in the diamond industry.
The grading system developed by the EGL set the standard for diamond grading and gemological identification and is internationally recognized.
Characteristics documented in the Diamond Grading Report: Shape and Cutting Style: The diamond’s shape and cutting style.
Measurement: The diamond’s dimensions in millimeter.
Weight: The weight of diamond listed to the nearest hundredth of a carat.
Color Grade: A grading which assesses the absence of color in a diamond.
Clarity Grade:Clarity grade determined under 10x magnification.
Cut Grade: A grade of cut as determined by a diamond’s face-up appearance, design and craftsmanship.
Finish: Grades that represent a diamond’s surface and facet placement.
Polish: Rating the overall smoothness of the diamond’s surface.
Symmetry: Measures the shape, alignment and placement of the diamond’s facets in relation to one another as well as the evenness of the outline.
Fluorescence: Color and strength of color when diamond is viewed under ultraviolet light.
Comments: A description of additional diamond characteristics not already mentioned in the report.
Clarity Plot: A map of the approximate size, type, and position of inclusions as viewed under a microscope.
Proportion Diagram: A map of the diamond’s actual proportions.
The Proportion Diagram includes the following information:
Depth: The height of a gemstone measured from the culet to the table.
