Karl began his career at JMN Jewelers in 1975, where he learned the basics of jewelry repair and manufacturing. After  receiving credentials as a Graduate Gemologist, he expanded services to include a diamond brokerage, gem appraisals and custom jewelry design. Karl's services have been utilized by private corporations and individuals as well as insurance companies, government agencies, and law firms.   He is a certified senior member of the National Association of Jewelry Appraisers and an accredited Senior Gemologist of the Accredited Gemologists Association and has completed the Advanced Personal Property Appraisal Course (APPA) administered by the American Gem Society. Karl has been certified to serve as an Expert Witness in the state of Hawaii for the First Circuit, District and Family Court