Colourless to near colourless diopside from Canada and Kenya. Published in Journal of Gemmology, 2014, 4, 291-292.
Author(s): M.S. Krzemnicki
Quartz with radiating fibres, sold as Trapiche quartz. Published in Journal of Gemmology, 2014, 4, 296-298.
Author(s): M.S. Krzemnicki, B.M. Laurs
Alumosilicates: Andalusite, Kyanite, Sillimanite. Published in Journal of Gemmological Association of Hong Kong GAHK, 2014, 34, 22-23.
Author(s): H.A. Haenni
The influence of pearl oyster farming on reef fish abundance and diversity in Ahe, French Polynesia. Published in Marine Pollution Bulletin, 78, 43-50.
Author(s):L.E. Cartier, K.E. Carpenter
Talk by Jean-Pierre Chalain at 2014 Swiss Gemmological Society conference on the ASDI instrument developed by SSEF to detect colourless synthetic diamonds in melee batches.
Presentation on origin determination of coloured gemstones by Dr. Michael Krzemnicki at 2014 Scottish Gemmological Conference.
Inhorgenta Pearl Forum talk by Dr. Michael S. Krzemnicki in February 2014.
News from the SSEF Lab. 2014 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Abstract: We report the first successful extraction of oyster DNA from a pearl and use it to identify the source oyster species for the three major pearl-producing oyster species Pinctada margaritifera, P. maxima and P. radiata. Both mitochondrial and nuclear gene fragments could be PCR-amplified and sequenced. A polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay in the internal transcribed spacer (ITS) region was developed and used to identify 18 pearls of unknown origin. A micro-drilling technique was developed to obtain small amounts of DNA while maintaining the commercial value of the pearls. This DNA fingerprinting method could be used to document the source of historic pearls and will provide more transparency for traders and consumers within the pearl industry.
Author(s): J.B. Meyer, L.E. Cartier, E.A. Pinto-Figueroa, M.S. Krzemnicki, H.A. Haenni, B.A. McDonald
Natural and synthetic vanadium-bearing chrysoberyl. Published in Journal of Gemmology, 2013, 33, 7–8, 223-238.
Author(s): K. Schmetzer, M.S. Krzemnicki, T. Hainschwang, H.-J. Bernhardt