Joel Hassler, Owner/Appraiser




  • Appraiser/CEO/Owner - Rasmussen Diamonds, Racine, WI 2000-2017
  • Graduate Diamond Diploma (Gemological Institute of America, 2001)
  • Graduate Colored Stones Diploma (Gemological Institute of America, 2002)
  • Graduate Gemologist G.G. 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 2018)
  • Independent Certified Gemologist Appraiser (American Gem Society 2019)


  • Regular Color Vision screening
  • Various industry continuing education programs
  • Member, Gemological Institute of America Alumni Association
  • Past Board member:
    American Gem Society
    Wisconsin Jewelers Association
    Past-President, Wisconsin Guild of the American Gem Society


All our services are by appointment at the location of your choosing.  We can also accommodate meetings at an attorney's office or bank vault.  Delivery services available on request.