American Institute of Gemological Research, Inc.

independent jewelry appraisal and gemological services

303-420-2369  •  888-420-2369  •  Fax: 303-782-5511


About Us

Jewelry Appraisals

Gemstone Certificates



Contact Us

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Welcome to AIGR  

Do you want to know how much your jewelry is worth before you sell it?

Have you bought gems or jewelry online and need expert verification that you bought what was advertised?

Did you inherit jewelry and need to know its value?

Have you purchased an item from an unfamiliar jeweler or pawn shop?

Are you a jeweler who needs certificates for your gemstones?

AIGR's gemologists are experts in the field of gemology with in-depth knowledge of jewelry manufacture and pricing, and we can provide you with peace of mind about your jewelry and gemstones and can document their value.

The American Institute of Gemological Research (AIGR), Inc., is an independent gem lab serving the Denver metropolitan area and Colorado front range. Our experienced appraisers will evaluate your jewelry in our laboratory and provide printed appraisals. (Please see the samples on the Jewelry Appraisals page.) Appraisals will be performed by gemologists who have graduated from the Gemological Institute of America, and we guarantee that the appraisals will be accepted by your insurance company.

We are here to help.

Please call us at 303-420-2369 or e-mail us using the contact form to schedule an appointment at one of our locations. We are generally available on weekday afternoons.

You can also schedule an appointment with an AIGR gemologist at an appraisal clinic held at a local jewelry store by calling the number listed here for the store closest to you.

AIGR has served clients from states shown in red.

© 2011 AIGR, Inc. Last update: July 8, 2014