Pezzottaite – a new mineral
Pezzottaite – a new mineral. Published in GAHK Journal, 2003. Author(s): H.A. Haenni, M.S. Krzemnicki
Star garnets and star garnet cat’s-eyes from Ambatondrazaka, Madagascar
Star garnets and star garnet cat’s-eyes from Ambatondrazaka, Madagascar. Published in Journal of Gemmology, 2002. Author(s): K. Schmetzer, H.-J. Bernhardt, L. Kiefert
Rosa bis rosa-orangefarbene Malaya-Granate aus Bekily, Madagaskar
Rosa bis rosa-orangefarbene Malaya-Granate aus Bekily, Madagaskar. Published in GZ, 2002. Author(s): K. Schmetzer, L. Kiefert, T. Hainschwang, H.-J. Bernhardt
Orange topaz with synthetic hematite coating
Orange topaz with synthetic hematite coating. Published in Gems & Gemology, 2002. Author(s): M.S. Krzemnicki
Colour-change garnets from Madagascar: comparison of colorimetric with chemical data
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
A glass imitation of blue chalcedony
A glass imitation of blue chalcedony. Published in Journal of Gemmology, 2001. Author(s): H.A. Haenni, S. Tien Wu, Y. Xingqiang, T. Wen-Po
Hauyn aus der Eifel – ein attraktiver Edelstein
Hauyn aus der Eifel – ein attraktiver Edelstein. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2000. Author(s): L. Kiefert
Diopside needles as inclusions in demantoid garnet from Russia: A Raman microspectrometric study
Diopside needles as inclusions in demantoid garnet from Russia: A Raman microspectrometric study. Published in Gems & Gemology, 1999. Author(s): M.S. Krzemnicki
Les grenats gemmes
Les grenats gemmes. Published in Revue A.F.G., 1999. Author(s): H.A. Haenni
Distinction of taaffeite and musgravite
Distinction of taaffeite and musgravite. Published in Journal of Gemmology, 1998. Author(s): L. Kiefert, K. Schmetzer