Ted A. Irwin


Graduate Gemologist (G.G.), Gemological Institute of America

Independent Certified Gemologist Appraiser (I.C.G.A), American Gem Society

Accredited Senior Gemologist, Accredited Gemologists Association

Member, National Association of Jewelry Appraisers

Member, Association of Independent Jewellery Valuers

Member, Jewelers Vigilance Committee

Member, American Society of Jewelry Historians

Member, Scottish Gemological Association

2014-2015 Uniform Standards of Professional Appraisal Practices (USPAP)

Insurance Producer’s License State of Washington

Bachelor of Arts, Business Administration, University of Puget Sound


President, Northwest Gemological Laboratory, Inc. (NGL), an independent laboratory for the appraisal for fine jewelry and gemstones.

Media consultant for consumer advocacy on gemstones and jewelry scams – appearing in segments aired on CBS Evening News, This Morning, local affiliates KIRO and KING TV. Expert panel discussion on diamonds, KIRO radio, gemological expert, Antiques Road Show, PBS.

Expert testimony in jewelry and gemstone matters at trial and through deposition.

Estimated articles appraised: 200,000+

Several hundred appraisal clinics

Director, Northwest Gemological Institute, L.L.C. (NGI), school of gemology and period jewelry.

Instructor, developer of gemological courses open to the trade and public including Diamond Grading, Gemstone Identification, Gemstone Evaluation, Opals, Jade and Precious Metals, corporate training nation-wide. Host of the Northwest Jewelry Conference, an annual multi-speaker gathering for period jewelry enthusiasts.

American Gem Society – Appraisal Standards, Education, Gemological Sciences committees

Accredited Gemologists Association – Board of Governors, Tucson and Las Vegas conference committees

See “Recent Events” listing for recent trade participation.


Revised 4/2016

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