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Gemological Institute of America Diamond Grading Report

The Gemological Institute of America (GIA) provides diamond grading reports that document specific characteristics of a diamond. GIA is one of the most respected institutes of the diamond industry, worldwide. You can view an example of a GIA diamond grading reporting by clicking the link at the bottom of the page. The contents in a grading report are listed below.

The GIA Diamond Grading Report contains the following information:


This is the date that the diamond was examined by GIA.

Report Number

GIA gives each diamond an individual report number, which is contained on the GIA global database.

Laser Inscription Registry

At the customer’s request, a diamond may be micro-laser inscribed with the GIA report number.

Shape and Cutting Style

These are descriptions of the shape (outline of the diamond), and the cutting style (pattern of facet arrangement).


Measures the dimensions of the diamond.

Carat Weight

The weight of the diamond is given in carats (one carat is 1/5th of a gram). Weight is recorded to the nearest 100th of a gram.

Colour Grade

Evaluates absence of colour in a diamond.

Clarity Grade

Clarity grade is determined under a 10x magnification.

Cut Grade

Cut grade is determined by the diamond’s face-up appearance, design, and craftsmanship.


Represents the diamond’s surface and facet placement.


The condition of the diamond’s surface.


This refers to the exactness of the diamond’s outline, and the shape, placement and alignment of its facets.


The colour of the diamond when viewed under ultraviolet light.


Any additional identifying characteristics, not otherwise mentioned on the report.

(Additional) Inscription

Listed here is any additional information inscribed on the diamond.

Plotting Diagram

An approximate map of inclusions, as viewed under a microscope.

Proportion Diagram

A profile depiction of the diamond’s actual proportions.

Key to Symbols

Describes any symbols used (if any) on the report.

Security Features

GIA certificates include security measures such as hologram, security screen, and micro-print lines.