Status: Member
Business Type: Trade Valuer and Valuer in Private Practice

Ted Irwin is president of Northwest Gemological Laboratory (founded 1978) and provides documentation on contemporary to antique fine jewelry, watches, pearls and gemstones for insurance, estate or other legal purposes. Consultations and abbreviated reports are available for resale and distribution situations.

Mr Irwin has appeared on local & national television, including the Antiques Roadshow and segments relating to jewelry scams.

Course creator, educator and owner of the Northwest Gemological Institute, Mr Irwin also sits on the Gemological Sciences, Appraisals and Education Committees of the American Gem Society.

Fully equipped laboratory of the highest standard, designated an "Accredited Gemological Laboratory" by the AGS and a "Certified Gemological Laboratory" by the AGA

  • Graduate Gemologist (GG) - Gemological Institute of America (GIA)
  • Independent Certified Gemologist Appraiser (ICGA) - American Gem Society (AGS)
  • Accredited Senior Gemologist (ASG) - Accredited Gemologist Association (AGA)
  • Member - National Association of Jewelry Appraisers (NAJA)
  • Member - Scottish Gemmological Association (SGA)
  • Member - American Society of Jewelry Historians (ASJH)


Ted A Irwin G.G., I.C.G.A., A.S.G., N.A.J.A.
Northwest Gemological Laboratory
10801 Main Street Suite 105
WA 98004-6366
United States of America
Telephone: 425-455-0985

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