Professional Gem Sciences

Laboratory, Ltd.

​5 S. Wabash Avenue, Suite 315​

Chicago, IL 60603


© Copyright 2019  PGSL

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Meet the professional staff of PGSL. With hundreds of thousands of graded stones, PGSL can boast a measure of experience that spans decades. Learn about our background and find out how we can uniquely serve all your gem needs. 

PGSL offers reports for loose stones as well as finished jewelry. Services include full diamond certificates, origin reports, damage reports, and appraisals for insurance replacement. From the Quality Analysis Report to the Carte Blu, learn about all our gemological services.

Summer 2019


PGS Lab will be speaking this summer at the annual National Pawnbrokers convention in Las Vegas. This year we will be delivering a presentation centered on synthetic diamonds. It is an excellent opportunity for pawn professionals to hone their skills and stay up to date with all the developments affecting the market.

December 2016 

The laboratory was interviewed by the Chicago Tribune on the prevalence and market implications of synthetic, man-made diamonds. We discussed some of the lab's methods for detection and disclosure of these products. 


Click Here for a pdf copy or read full article at the Chicago Tribune link

PGS Laboratory is proud to be a member of the following organizations:
Chicago Jewelers Association