Joel Hassler; GIA GG, ICGA (AGS)


  • Independent Certified Gemologist Appraiser (American Gem Society® 2019)
  • Graduate Gemologist G.G. Diploma (Gemological Institute of America, 2002)
  • Graduate Diamond Diploma (Gemological Institute of America, 2001)
  • Graduate Colored Stones Diploma (Gemological Institute of America, 2002)
  • Certified Insurance Appraiser (Jewelry Insurance Appraisal Institute, 2003)
  • Registered Jeweler (American Gem Society®, 2002)
  • Certified Gemologist (American Gem Society®, 2003)
  • Certified Gemologist Appraiser (American Gem Society®, 2003)


  • Certified Gemologist Appraiser Instructor, American Gem Society®
  • Session Presenter, American Gem Society® Conclave
  • Contributing Author, “Spectra” publication, American Gem Society®

Organizational Affiliations

  • Member Firm, American Gem Society
  • Chair, Appraisal Standards Committee (American Gem Society®)
  • Member, Diamond Grading Standards Committee (American Gem Society®)
  • Member, Gemological Institute of America Alumni Association

Miscellaneous Education and Experience

  • Accredited Gem Laboratory, American Gem Society®
  • Certified Pearl Specialist – Cultured Pearl Association of America (2019)
  • American Gem Society® Annual Re-certification exam
  • Color Vision screening (Biennial)
  • Various industry continuing education programs and conferences
  • Appraiser/CEO/Owner - Rasmussen Diamonds, Racine, WI 2000-2017
  • Past Board member:
    American Gem Society®
    Wisconsin Jewelers Association
    Wisconsin Guild of the American Gem Society® – Past President


All services are by appointment at our office in downtown Racine.  We can also accommodate meetings at an attorney's office or bank vault.  Delivery services available on request.