About GIA & IGI Diamond Reports

About GIA & IGI Diamond Reports

About GIA

The Gemological Institute of America (GIA) is headquartered in Carslbad, California. Besides being a leading educational institute, GIA provides diamond grading reports, which are issued by the GIA Gem Trade Laboratory.

GIA, established in 1931, grades diamonds of all shapes and sizes and was the creator of the 4C's (clarity, colour, cut and carat weight).

GIA Diamond Report

A GIA Diamond Report is issued for diamonds of all shapes and sizes above 1.00ct. The report includes a comprehensive analysis of a diamonds quality and assessment of the diamonds 4C's – clarity, colour, cut and carat weight with a plot of the diamonds clarity characteristics. The report includes a Polish and Symmetry grade. 

 GIA Diamond Dossier®

The GIA Diamond Dossier® is a compact report for diamonds of all shapes weighing under 1.00ct on the GIA's D-Z colour scale. The Dossier includes analysis of the diamonds 4C's but does not include a plot of the diamonds clarity characteristics. All diamonds with a GIA Diamond Dossier's are laser inscribed on the girdle with the Dossier number.



About IGI 

Around the world, IGI (International Gemological Institute) diamond reports bring confidence when buying or selling diamonds. IGI is the largest organisation of its kind, with operating laboratories & offices in Antwerp, New York, Hong Kong, Mumbai, Bangkok, Tokyo, Dubai, Tel Aviv, Toronto, Los Angeles, Kolkata, New Delhi, Thrissur, Jaipur, Surat, Chennai, Ahmedabad and Hyderabad. 

IGI have a staff of over 450 professionals dedicated to a standard of excellence second to none who issue more than one million reports per year.

IGI Diamond Reports are issued for diamonds of any size; a plotted diagram of the characteristics and a graphic representation of proportions appear on many of the IGI documents. 

Example of IGI Diamond Report