Gemmological Analysis of a Roman Sapphire Intaglio and Its Possible Origin
Gemmological Analysis of a Roman Sapphire Intaglio and Its Possible Origin. Published in Journal of Gemmology, 2019, 36(8), 710-724.
SSEF Fieldtrip to Paraiba, Brazil (2018)
Presentation given by Alexander Klumb at 2018 Swiss Gemmological Society conference on an SSEF fieldtrip to the Paraiba region of Brazil.
Origin determination and traceability: An overview for gemstones
Origin determination and traceability: An overview for gemstones. Presentation at GemGenève 2019 by Dr. Michael S. Krzemnicki.
Spinel from Mogok, Myanmar—A Detailed Inclusion Study by Raman Microspectroscopy and Scanning Electron Microscopy
Spinel from Mogok, Myanmar—A Detailed Inclusion Study by Raman Microspectroscopy and Scanning Electron Microscopy. Published in Journal of Gemmology, 2019, 36(5), 418-435.
Sapphires from Ambatondrazaka, Madagascar
Madagascar, an island of many gem treasures, saw in recent months another ‘sapphire rush’ after the discovery of a new gem deposit about 35 km east of the small town of Ambatondrazaka.
Sapphires from a New Deposit at Bemainty near Ambatondrazaka in Madagascar
Sapphires from a New Deposit at Bemainty near Ambatondrazaka in Madagascar. Published in Incolor, 2017, 35, 44-47. Author(s): M.S. Krzemnicki
Marble-hosted ruby deposits of the Morogoro Region, Tanzania
Marble-hosted ruby deposits of the Morogoro Region, Tanzania. Published in Journal of African Earth Sciences, 2017, 134, 626-643. Link to article: https://doi.org/10.1016/j.jafrearsci.2017.07.026 Author(s): W.A. Balmer, C.A. Hauzenberger, H. Fritz, C. Sutthirat
Sapphire from Andranondambo, Madagascar
first published in Facette 22 (February 2016) In 2016, the SSEF received a sapphire of exceptional quality and size for testing (Figure 1). The sapphire of 33 ct was characterised by a saturated blue colour, – poetically also known as royal blue and a highly attractive velvety appearance due to submi
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 Revelstoke occurrence in the Canadian Cordillera of British Columbia. Published in 2015 Swiss Geoscience Meeting Proceedings, 126. Author(s) :T. DzikowskiJ. CempirekL.A. GroatG.M. DippleG. Giuliani
Nail-head Spicules as Inclusions in Chrysoberyl from Myanmar
Nail-head Spicules as Inclusions in Chrysoberyl from Myanmar. Published in Journal of Gemmology, 2015, 5, 434-438. Author(s): K. Schmetzer, M.S. Krzemnicki