Lab #36
Since: 2009

certified Gemological Laboratory

Laboratory #36
Awarded: 2009

Theresa (Teri) Brossmer


Accredited Senior Gemologist

Professional Experience

  • Gem Appraisals Unlimited, Inc, established in 1981.
  • Over 40 years of experience in the appraisal of gems and jewelry
  • Developed and taught principles of valuation courses for the American Society of Appraisers for more than ten years.
  • Traveled to Shang Hai China to co-teach appraisal valuation theory to gemologists, 2016-2019.
  • Qualified by the Appraisal Qualifications Board as a Certified USPAP Instructor

Specialized Training

1981 – Graduate Gemologist (GIA)
2005 – ASA and Master Gemologist Appraiser  (American Society of Appraisers)
2008 – Accredited Senior Gemologist (Accredited Gemologists Association)
2008 – Senior Member – National Association of Jewelry Appraisers (NAJA)
2009 – AGA Certified Gemological Laboratory #36 (Accredited Gemologists Association)
2011 – Certified Insurance Appraiser (JIAI)
2015 – ASA ARM (American Society of Appraisers)
2018 – Certified USPAP Instructor (Appraisal Qualifications Board)

Industry Memberships

GIA Alumni, since 1992
National Association of Jewelry Appraisers (NAJA), since 1995
American Society of Appraisers (ASA), since 2005
Accredited Gemologists Association (AGA), since 2005

Industry Contributions

AGA President, 2020-2026
ASA Discipline Chair, Education Chair, Course Developer, and Instructor
ASA International Ethics Committee

Contact Information