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Research Leaders with World Expertise
Welcome to CGL – Canadian Gemlab Inc.
Research Leaders with World Expertise

Gemological & Appraisal Service

CGL Canadian Gemlab is a full service laboratory offering the Identification (natural, treated or synthetic), grading and appraising of diamonds and coloured stones.

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Branko Deljanin frequently lectures and offers workshops on standard and advanced gemological topics world-wide at major gemological centres and gem shows.  

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Research on rough and polished diamonds (coloured and colourless), as well as treatments and country of origin for coloured stones

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Research Leaders with World Expertise

Branko Deljanin

Branko Deljanin, B.Sc., GG, FGA, DGA, DUG
CGL Canadian Gemlab President & Head Gemologist


CGL Canadian Gemlab is one of Canada’s most technologically advanced gemological laboratories specializing in Identification, Grading and Certification of Diamonds.

Headed by renowned research gemologist Branko DeljaninCGL Canadian Gemlab’s aim is to set a new standard of excellence and accuracy in all diamond, gem, and jewellery reports.

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