Jeffery’s formal gemmological training was accomplished at SSEF, the prestigious Swiss Gemmological Institute in Basel, Switzerland where he successfully completed and passed requisite exams for his Basic Gemmology (BGC), Basic Diamonds (BDC), Advanced Pearls, Advanced Colored Stones & Scientific Gemmology Diplomas and Certificates. Additionally, he is an Accredited Senior Gemologist voting member of the AGA – Accredited Gemologists Association.
With five decades of broad-based gem and jewelry trade experience, Jeffery is uniquely qualified as a consultant and an independent appraiser. As such he has performed in-depth consultations on behalf of investors and has generated appraisals for both private and corporate clients.