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Research Leaders with World Expertise


Who We Are?

CGL Gemmological TeamCGL – Canadian Gemlab Inc. was founded in the summer of 2009 by B. Deljanin and W. Vermeulen in Vancouver and is the most technologically advanced Gemological Laboratory in Canada.  Our team has more than 50 years of combined experience working in major North American laboratories and the diamond trade.

In 2013 CGL joined forces with GRS lab (A. Peretti) to establish 4 research centers in Switzerland, Hong Kong, Thailand and Canada with the intent to create a new task force for joint research and discovery of the latest arrivals of new diamond synthetics and treatments on the market.

To visit GRS GemResearch Swisslab, world renowned specialists in Coloured Stone Origin Rerports please follow

We offer a multitude of services, including but not limited to:

  • Grading and Certification of Colourless and Coloured Diamonds (to GIA standards), Jewellery
  • Identification and Certification of Gem Stones, Jade and Pearls
  • Appraising of Diamonds, Gemstones and Jewellery
  • Lasering and Certifications of Canadian diamonds for 5 major brands
  • Custom-made Certificates


CGL is strategically positioned in the North American market and has clients in Canada, USA and Asia. Due to the international recognition of co-founder and director Branko Deljanin, known as an expert gemologist for testing of colourless and colored diamonds, CGL education programs have been presented in 12 countries on 4 continents. The most popular education programs are Intermediate and Advanced DIAMOND Programs that are comprised of intense workshops working with samples of natural, treated and synthetic diamonds using standard and advanced instruments.


For latest joint CGL and GRS research and publication on CVD-grown coloured diamonds please follow

With so many new diamond treatments and new production of near-colourless and coloured lab-grown diamonds, proper identification is of paramount importance.

Meet the Team

Branko Deljanin

President / Head Gemmologist / Researcher

B. Sc (geology), GG, FGA, DGA (UK), DUG (University Gemmological Diploma – France)

Bill Vermeulen

Vice president / Laser Technician / Printer



Angelina Yip

Appraiser / Gemmologist / Instructor

Graduate Gemologist (GIA),
Accredited Senior Gemologist (AGA)
Registered Master Valuer 0090710147
Member of GIA, AGA, NAJA, AIJV

Edit Simon

Diamond Grader / Gemmologist / Instructor

Accredited Jewelry Professional (AJP)

Graduate Gemologist (GG)

Graduate Pearls (GP)

CAD Jewellery Designer

Brian Delos Reyes

Laser Technician/Printer/Photographer

Elena Deljanin

Rough Diamond Researcher/Gemmologist


FGA with Distinction (UK)

FCGmA (Canada)

Peter Drakopoulos

Customer Service/Sarin Technician
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