Visit to Tanzanian spinel and corundum deposits (2010)
Presentation at Swiss Gemmological Society about trip to spinel and corundum deposits in Tanzania in October 2009 by Dr. Walter Balmer and Dr. Michael Krzemnicki
How to get the blues out of the pink- detection of low temperature treatment of pink sapphires (2010)
Presentation at Swiss Gemmological Society about trip to spinel and corundum deposits in Tanzania in October 2009 by Dr. Walter Balmer and Dr. Michael Krzemnicki
Observations on treated ruby and sapphire
Observations on treated ruby and sapphire. Published in […]
Are new sapphires from Sri Lanka diffusion-treated or not?
Are new sapphires from Sri Lanka diffusion-treated or n […]
Orange treated sapphire: towards finding a name for a new product
Orange treated sapphire: towards finding a name for a n […]
Eine neue Diffusionsbehandlung liefert orangefarbene und gelbe Saphire
Eine neue Diffusionsbehandlung liefert orangefarbene un […]
Ein Besuch bei den Saphirkochern von Chantaburi
Ein Besuch bei den Saphirkochern von Chantaburi. Publis […]
Investigations on sapphires from an alkali basalt, South West Rwanda
Investigations on sapphires from an alkali basalt, Sout […]
Ein neues Vorkommen im Süden von Madagaskar
Ein neues Vorkommen im Süden von Madagaskar. Published […]