To what an extent a jeweller can detect treated diamonds. Published in Le Diamant, rêve et réalité, 2004.
Author(s): H.A. Haenni
Pezzottaite, a new mineral and gem. Published in Journal of Gemmology, 2004.
Author(s): H.A. Haenni, M.S. Krzemnicki
Pezzottait – ein neues Mineral. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2004.
Author(s): H.A. Haenni, M.S. Krzemnicki
GemLIBS: a new analytical instrument to analyse beryllium in orange sapphires. Published in GAHK Journal, 2004.
Author(s): H.A. Haenni, M.S. Krzemnicki
Ein notwendiger Test in der Perlenuntersuchung. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2004.
Author(s): H.A. Haenni
Der Diamant. Published in Rohm Zeit, 2004.
Author(s): H.A. Haenni
Are new sapphires from Sri Lanka diffusion-treated or not? Published in Jewellery News Asia, 2004.
Author(s): H.A. Haenni
Spectroscopic properties of an historical greenish yellow diamond. Published in 2004.
Author(s): J.-P. Chalain, G. Bosshart, V. Hammer
Poudretteite: A rare gem species from the Mogok Valley. Published in Gems & Gemology, 2003.
Author(s): C.P. Smith, G. Bosshart, S. Graeser, H.A. Haenni, D. Guenther, K. Hametner, E. Guebelin
Verschiedenfarbige Bernsteine aus dem Baltikum. Published in 2003.
Author(s): L. Kiefert