Eine neue Diffusionsbehandlung liefert orangefarbene und gelbe Saphire. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2002.
Author(s): H.A. Haenni, T. Pettke
Ein Besuch bei den Saphirkochern von Chantaburi. Published in GoldOr, 2002.
Author(s): H.A. Haenni
Edelsteine heute: echt, behandelt oder synthetisch?. Published in Der Sachverständige, 2002.
Author(s): H.A. Haenni
Les nouvelles mines d’émeraudes de la Pita (Colombie). Published in Revue A.F.G. by Fritsch et al (2002)
La certification de diamants de type IIa. Published in Revue A.F.G., 2002.
Author(s): J.-P. Chalain
À la poursuite du diamant noir – On the trail of the black diamond. Published in 2001.
Colour-change garnets from Madagascar: comparison of colorimetric with chemical data. Published in Journal of Gemmology, 2001.
Author(s): M.S. Krzemnicki, H.A. Haenni, E. Reusser
Synthetischer Moissanit aus Russland. Published in GZ, 2001.
Author(s): L. Kiefert, K. Schmetzer, H.A. Haenni
Synthetic moissanite from Russia. Published in Journal of Gemmology, 2001.
Author(s): L. Kiefert, K. Schmetzer, H.A. Haenni
Raman spectroscopic applications in gemmology. Published in 2001.
Author(s): L. Kiefert, H.A. Haenni, T. Ostertag