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International gemological institute (IGI) :

International Gemmological Institute (IGI) is the largest independent laboratory for grading and evaluating gemstones and fine jewellery, and is renowned for its quality services, extensive experience and expertise.

Besides exceptional stones, a gem has no name, no history. It's a gem! The final user doesn't know where the stone was found, who extracted it, which polished it or the name of the gem dealer. The only document that travels around the world with the gem is the gemmological report. The IGI report is "The Passport for your gems and jewellery!.

The IGI Gemstones Report is essentially a statement attesting to the authenticity of a gemstones and provides a reliable and accurate report of its identity and grade based on an internationally recognized system. Each gemstones is scientifically analysed by several gemmologists who use their experience in combination with state-of-the-art equipment to produce an accurate description of the characteristics of the gemstones and the quality of its cut. With its detailed information presented in understandable language, the different qualities of a gemstones can be truly appreciated.

The grade or quality of a gemstones is based on four characteristics commonly referred to as the 4Cs: the Carat weight, Colour, Clarity, and Cut. These are analysed and the results are recorded in the IGI Gemstones Report.

Analysis and grading:

IGI laboratories are equipped with the most technologically advanced instruments for the identification and authentication of colored stones. These instruments include immersion cells, micrometers, spectroscopes, polariscopes, refractometers, specific gravity liquids, binocular microscopes and spectrophotometers.

Techniques such as stone coating, diffusion treatment, heat treatment, polymer impregnation and clarity enhancement as well as sophisticated developments in creating synthetic gems, are commonplace today.

IGI's approach to colored stone analysis is extremely important to you, especially in light of the fast-evolving new techniques being used to alter and treat rubies, sapphires, emeralds and other stones.

Colored stone identification report

The colored stone identification report identifies the gemstone's specific variety, shape and cut, carat weight, measurements, colour quality and transparency factor, as well as other major optical characteristics. Disclosure of treatments is also noted in this report. Upon request, country of origin may be determined. The certificate clearly states if the stone is natural or synthetic.

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