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EXCELLENCE IN GEMSTONE CERTIFICATION & DIAMOND GRADING
In 2016, WGI successfully moved their headquarters from Ramat Gan “Israeli Diamond Exchange” to a new, London based laboratory in the heart of the diamond district Hatton Garden.
World Gemological Institute (WGI) is dedicated to providing the highest level of service and expertise to its clients, ensuring the integrity of the diamond, gemstone and jewellery industry. With its commitment to education, research, and certification, WGI is an invaluable resource for anyone interested in the world of gemstones.
OUR GEMOLOGISTS
Our team of Gemologists, who have graduated from the esteemed Gemological Institute of America (GIA), boast extensive industry experience. In order to continually enhance their expertise, our staff diligently participate in seminars, lectures, and advanced gemological studies. Notably, they pursue the esteemed Fellowship (FGA) offered by the esteemed Gemological Association of Great Britain (Gem-A).
WGI enjoys a strong reputation within the diamond industry, as well as among jewellery manufacturers and retailers. We adhere to a conservative approach in our gradings, ensuring dependable consistency in delivering results to all our valued customers.
OUR MISSION
Our goal at WGI is to accurately identify, grade and evaluate diamonds, gemstones, pearls and jewellery; distinguish if they have been treated prior to your purchase, and determine the origin and authenticity.
Our laboratory applies the highest standards, using the most updated technology and qualified gemologists. WGI grading processes are updated according to the latest industry developments.
The standards of testing and the equipment utilised are in line with industry’s latest techniques. WGI continually invests in acquiring the highly innovative technological instruments for more precise and accurate gradings. We take great care with customer’s precious items and details with the high standard of integrity.
Awards & Industry Recognition
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Frequently Asked Questions
Find answers to common questions about diamond grading, gemstone identification, and jewelry certification. Our expert insights ensure you understand our processes and make informed decisions with confidence.
Thermal enhancement refers to heating and is the most common treatment for the majority of gemstones. Other colour gemstones treatments are: lattice diffusion, fracture filling with oil or resin, leadglass and dyeing.
Different findings in other reports may depend from different time and condition of the analysis; new or improved techniques or equipment may be used along with the methods used by the person who actually performed the test.
If diamonds or gemstones are set in a jewel, their analysis can be affected by the way they are mounted; some cases can reveal the Not Applicability of the techniques used to state is a stone is natural, permanently or not permanently treated or if it is synthetic.
The valuation refers to a Recommended Retail Price (RRP) and in any case does not function as a guarantee or warranty, it acts only as a recommendation.
