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News & Publication

Stay up to date on our latests news and publications.

Jewelry Care

Learn the best ways to take care of your jewelry to ensure its longevity. 

FAQ

Find answers to frequently asked questions.

Buying Tips

Interested in buying jewelry? We have tips for you. 

Lab Notes

Check out what we've been working on in the laboratory.

Gemstone Treatment

If you're buying jewelry, keep your eye out for these treatments. 

Professional Gem Sciences

Laboratory, Ltd.

​5 S. Wabash Avenue, Suite 315​

Chicago, IL 60603

   

© Copyright 2025  PGSL, Ltd.

Monday - Thursday

9:30am - 5:00 pm CST

Friday - Saturday:

By appointment only

T: (312) 920-1541



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