World Gemological Institute

Gemological Certification

14 Greville Street London EC1N 8SB Mon-Fri 9.30am to 6.00pm

Industry experienced Gemologists.

All of our Gemologists are graduates of the Gemological Institute of America (GIA) and have many years of industry experience. Our staff are required to continually improve upon their education and training by regularly attending seminars, lectures, and advanced gemological studies, including the coveted and highly regarded, Fellowship (FGA) through the Gemological Association of Great Britain (Gem-A).

WGI Certification:

WGI Gemmological Reports describe the characteristics of the gemstones submitted to be analysed tby the laboratory and also give a valuable asset to the jewellery Industry. The reports, with their unique online report verification number, contain results of loose or mounted diamonds or any gemstones, features and characteristics of eventual precious metals present in the jewellery that is analysed.

Diamond Grading:

Diamond reports cover the four C’s: cut, colour, clarity, and carat weight. The diamond report includes an in depth measurement of the proportions of your diamond, with a detailed mapping of the inclusions, which give you a complete visual of the internal characteristics of your gemstone, this is useful for identification purposes.


Gemstone Identification:

Gemstone Identification reports are requested for standard identification and verification of diamonds and colored stones. This report Includes the type of the material and it's measurements, quality, weight and will have a detailed photograph of the gemstone.


Pre-grade Evaluation:

When you are considering buying a diamond or a piece of jewellery, it is important to have the diamond evaluated to be sure you are getting what you paid for. It is recommended that you have a verbal pre-grade/evaluation on the item before you make the investment. You can then rest assured the diamond fulfils your expectations. Our team of valuers will be able to explain in detail the quality and value of the diamond, so you have a much better understanding of your investment.

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