Andrea J. Thorin, GG, GJ, AJP, ISA, Gems & Jewelry

Andrea J. Thorin, GG, GJ, AJP, ISA, Gems & Jewelry


Andrea J. Thorin
ISA member since Feb 20, 2007

(707) 480-9959 (Office)

Post Office Box 290
Healdsburg, CA 95448 , United States map

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I am a graduate gemologist and a certified personal property appraiser. I have an extensive background providing professional gemological and appraising services in Northern California and Sonoma County. My work includes: identifying and authenticating gemstones; and, performing jewelry appraisals for a variety of functions including: insurance, fair market, estate tax, charitable contribution, and casualty loss. In addition to my appraising business, I have enjoyed a successful professional career in Human Resources Development and Organizational Development.


  • Gemology/Gemstones
  • Jewelry - Contemporary


  • Gemological

Performs Appraisals Of

  • Gemology/Gemstones
  • Jewelry
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