Origin of gem corundum in calcite marble: The Revelstoke occurrence in the Canadian Cordillera of British Columbia
Origin of gem corundum in calcite marble: The Revelstok […]
Corundum Treatment (2013)
Presentation on developments in treatments of ruby, sapphire and corundum. Focus on characteristics, detection and declaration. Talk given at 2013 Swiss Gemmological Society conference by Dr. Michael Krzemnicki.
Colourful Treasures of Nature: Ruby, Sapphire, Emerald & Pearls (2012)
2012 Christie’s expert lecture by Dr. Michael Krzemnicki on exceptional coloured gemstones and natural pearls.
Analysis of rubies with corroded surfaces
Analysis of rubies with corroded surfaces. Journal of G […]
Heating and diffusion processes on rubies: characteristics, detection and declaration (2010)
Talk on ruby treatments and terminology during CIBJO Ruby Day in Munich in February 2010.
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
Nouveautés sur le marché: rubis de Montepuez, Mozambique
Nouveautés sur le marché: rubis de Montepuez, Mozambiqu […]
Neu im Handel: Rubine aus Montepuez, Mosambik
Neu im Handel: Rubine aus Montepuez, Mosambik. Publishe […]
New rubies from Montepuez, Mozambique
New rubies from Montepuez, Mozambique. Published in Jew […]