SSEF Mourns the Loss of Former Director Professor Henry A. Hänni

January 13, 2025

Basel, Switzerland – It is with sadness that we announce the passing of Professor Henry A. Hänni, former Director of the Swiss Gemmological Institute SSEF, who died peacefully at his home in Basel on January 9, 2025, surrounded by his family.

Professor Hänni, whose remarkable career spanned over four decades, was a pioneering figure in the field of gemmology. His journey began as a technical assistant at the Mineralogical Institute of the University of Basel, where his fascination with minerals led him to pursue advanced studies, culminating in a PhD on beryl from the Swiss Alps in 1980.

In 1990, Professor Hänni assumed the role of Director at SSEF, where he made invaluable contributions to the institute’s development and international reputation. His groundbreaking research in pearl and coloured stone analysis, treatment detection, and origin determination has left an indelible mark on the field of gemmology. 

Even after his retirement in 2009, Professor Hänni remained actively engaged in gemstone research and education. As a Professor of Gemmology at the University of Basel since 1996, he inspired countless students and professionals worldwide through his teaching and mentorship, sharing not only his vast knowledge but also his infectious enthusiasm for the field.