A type IaB diamond showing a “tatami” strain pattern
A type IaB diamond showing a “tatami” strain pattern. Published in Gems & Gemology, 2003. Author(s): J.-P. Chalain
A natural yellow diamond with nickel-related optical centers
A natural yellow diamond with nickel-related optical centers. Published in Gems & Gemology, 2003. Author(s): J.-P. Chalain
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
Zuchtperlen vom Golf von Kalifornien, Mexiko
Zuchtperlen vom Golf von Kalifornien, Mexiko. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2002. Author(s): L. Kiefert
Russian synthetic moissanite
Russian synthetic moissanite. Published in Geologica, 2002. Author(s): L. Kiefert, K. Schmetzer, H.A. Haenni
SSEF introduces type II diamond spotter
SSEF introduces type II diamond spotter. Published in Rapaport Diamond Report, 2002. 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