Appearance of new bead material in cultured pearls
Abstract: A range of different materials has already been used as cores in beaded cultured pearls, and now two new alternative options, baroque shaped shell beads and Chinese freshwater cultured pearls, are being used. Experiments with beads of the latter, approximately 6.5 mm across, have been carried out with
Keshis entering natural pearl trade
Keshis entering natural pearl trade. Jewellery News Asia (2010) Author(s): M.S. Krzemnicki
X-ray computed microtomography: distinguishing natural pearls from beaded and non-beaded cultured pearls
Abstract: The distinction of natural from cultured pearls traditionally has been based on X-radiography. X-ray computed microtomography (μ-CT) has recently been applied to gain more insight into pearl structures. Using this technique, this article presents features observed in a selection of natural pearl
“Keshi”-Zuchtperlen: Eine neue Herausforderung für den Perlenhandel
“Keshi”-Zuchtperlen: Eine neue Herausforderung für den Perlenhandel. Gold’Or (2010) Author(s): M.S. Krzemnicki
Perles de culture “Keshi”: Un nouveau défi pour le commerce des perles
Perles de culture “Keshi”: Un nouveau défi pour le commerce des perles. Gold’Or (2010) Author(s): M.S. Krzemnicki
X-ray micro computed tomography: an explanation of the procedures and benefits (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
New developments in pearl analysis: Radiocarbon 14C age dating (2009)
Talk given on radiocarbon dating of pearls at International Gemmological Conference (IGC) in Arusha (Tanzania) in 2009 by Dr. Michael Krzemnicki.
New developments in pearl analysis: X-ray micro tomography (2009)
Presentation at 2009 European Gemmological Symposium (Bern, Switzerland) by Jean-Pierre Chalain on the platelet peak of HPHT-treated diamonds of type Ia.
Perles naturelles- abalone, conch, melo
Perles naturelles- abalone, conch, melo: perles exceptionelles d’escargots marins. Published in GoldOr, 2009. Author(s): M.S. Krzemnicki
Sur la trace de la structure des perles
Sur la trace de la structure des perles. Published in GoldOr, 2009. Author(s): M.S. Krzemnicki