Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite
Some uncommon sapphire “imitations”: Blue Co-zirconia, kyanite and blue dumortierite. Published in Journal of the Gemmological Association of Hong Kong GAHK, 34, 62-64 Author(s): M.S. Krzemnicki
Saphirs de couleur fantaisie, diversité multicolore d’une gemme classique
Saphirs de couleur fantaisie; diversité multicolore d’une gemme classique Author(s): M.S. Krzemnicki
Fantasiefarbene Saphire: Die attraktive Farbenvielfalt eines klassischen Edelsteins
Fantasiefarbene Saphire: Die attraktive Farbenvielfalt eines klassischen Edelstein. Gold’Or (2011) Author(s): M.S. Krzemnicki
Observations on treated ruby and sapphire
Observations on treated ruby and sapphire. Published in Taiwan Jewellery World Magazine, 2006. Author(s): H.A. Haenni
Sapphires from New Zealand
Sapphires from New Zealand. Published in 2006. Author(s): L. Kiefert, M.S. Krzemnicki, G. Du Toit, R. Befi, K. Schmetzer
Are new sapphires from Sri Lanka diffusion-treated or not?
Are new sapphires from Sri Lanka diffusion-treated or not? Published in Jewellery News Asia, 2004. Author(s): H.A. Haenni
Orange treated sapphire: towards finding a name for a new product
Orange treated sapphire: towards finding a name for a new product. Published in GAHK Journal, 2002. Author(s): H.A. Haenni
Eine neue Diffusionsbehandlung liefert orangefarbene und gelbe Saphire
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
Ein Besuch bei den Saphirkochern von Chantaburi. Published in GoldOr, 2002. Author(s): H.A. Haenni