The American Gem Registry, LLC. is Colorado’s premier full service, gemological laboratory and jewelry appraisal service. We are Denver's only AGS Independent Certified Gemologist Appraiser. We support both buyers and sellers of diamonds, gemstones and jewelry by supplying independent, accurate and USEFUL information.

Diamond and jewelry appraisals and consulting are all we do. We do appraisal work for insurance replacement, retail comparison, fair market value, estate valuation, damage claims, charitable contribution and other purposes and are fully accredited by the International Society of Appraisers, the American Gem Society and by the National Association of Jewelry Appraisers. We work with all major insurance companies, cruise lines, US and state courts and our reports have been accepted by the Colorado Department of Revenue and the US Internal Revenue Service for estate tax, charitable contribution and bankrupcy purposes. Our lab is certified by both the Accredited Gemologists Association and the American Gem Society. Appraisals are USPAP compliant and all grading is to GIA standards by a GIA graduate gemologist.

All stones are graded on-site by a GIA Graduate Gemologist and our private and secure gem lab is equipped with the finest tools available including the Saran Diamension cut measuring system, Gran colorimetry, ASET, Idealscope, AGS and GIA certified master diamonds, raytracing technology, and photomicrography. All work can usually be done while you wait, and while you watch. With our mobile lab, we can come to you and we are happy to work in cooperation with banks, accountants, attorneys and private individuals worldwide.

We are proud to be the only Colorado location for Gemprint International, the only court proven system for tracking individual diamonds.


Serving clients in the Denver metropolitain area including Boulder, Longmont and Fort Collins. Services available by appointment only. Please call 303-223-4944 or email


We are an appraisal firm only. We don't sell diamonds, gemstones or jewelry.

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