Fracture filling in emeralds and its detection with laboratory methods. Published in ICA Gazette, 1998.
Author(s): H.A. Haenni
Détermination de substances de remplissage dans les émeraudes. Published in Revue A.F.G., 1998.
Author(s): J.-P. Chalain, H.A. Haenni, L. Kiefert
Graeserite, a new mineral species from the derbylite group from the Monte Leone nappe, Binntal region, eastern Alps, Switzerland. Published in Canadian Mineralogist, 1998.
Author(s): M.S. Krzemnicki, E. Reusser
A Raman microscope in the gemmological laboratory: first experiences of application. Published in Journal of Gemmology, 1997.
Author(s): H.A. Haenni, L. Kiefert, J.-P. Chalain
Investigations on sapphires from an alkali basalt, South West Rwanda. Published in Journal of Gemmology, 1996.
Author(s): M.S. Krzemnicki, H.A. Haenni, R. Guggenheim, D. Mathys
Ein neues Vorkommen im Süden von Madagaskar. Published in 1996.
Author(s): L. Kiefert, K. Schmetzer, M.S. Krzemnicki, H.-J. Bernhardt, H.A. Haenni