Identification of filler substances in emeralds by infrared and Raman spectroscopy. Published in Journal of Gemmology, 1999.
Author(s): H.A. Haenni
Synthetischer Moissanit und Diamant: Sichere Unterscheidung mit Hilfe des Reflektometers. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1999.
Author(s): J.-P. Chalain, M.S. Krzemnicki
Mise à jour sur la détermination des substances de remplissage dans les emeraudes. Published in Revue A.F.G., 1999.
Author(s): J.-P. Chalain
Détection des diamants GE POL. Published in Revue A.F.G., 1999.
Author(s): J.-P. Chalain, H.A. Haenni, E. Fritsch
An imitation of black diamond: artificial black cubic zirconium oxide. Published in Gems & Gemology in 1999.
Author(s): J.-P. Chalain
Zur Färbung von Igmerald (synthetischer Smaragd, hergestellt von der I.G. Farbenindustrie). Published in GZ, 1998.
Author(s): K. Schmetzer, L. Kiefert
The colour of Igmerald: I.G. Farbenindustrie flux-grown synthetic emerald. Published in Journal of Gemmology, 1998.
Author(s): K. Schmetzer, L. Kiefert
Im Hydrothermalverfahren gezüchtete synthetische Smaragde aus China. Published in GZ, 1998.
Author(s): K. Schmetzer, L. Kiefert, H.-J. Bernhardt, Z. Beili
Distinction of taaffeite and musgravite. Published in Journal of Gemmology, 1998.
Author(s): L. Kiefert, K. Schmetzer
Short notes on some gemstone treatments. Published in GAHK Journal, 1998.
Author(s): H.A. Haenni