The Beryl Group – an Overview
The Beryl Group – an Overview. Published in Journal of the Gemmological Association of Hong Kong GAHK, 2020, Volume XLI, 48-54.
Gemstones of the Garnet Group – about mixed crystals and solid solution
Gemstones of the Garnet Group – about mixed crystals and solid solution. Published in Journal of the Gemmological Association of Hong Kong GAHK, 2019, Volume XL, 36-49.
Diamond testers with a limited performance
Diamond testers with a limited performance. Published in Journal of Gemmological Association of Hong Kong GAHK, 2017, 38, 37-39. Author(s): H.A. Haenni
GemTOF: A new and highly versatile method to analyse trace elements and isotopes of gemstones and pearls
GemTOF: A new and highly versatile method to analyse trace elements and isotopes of gemstones and pearls. Published in IGC Namibia 2017 Abstract Proceedings, 88-90. Author(s): M.S. Krzemnicki, W.A. Balmer, H.A.O. Wang, J.-P. Chalain, P. Lefevre, W. Zhou, L.E. Cartier, H.A. Haenni
Black Pearls – Grey Pearls
Black Pearls – Grey Pearls. Published in Journal of Gemmological Association of Hong Kong GAHK, 2017, 38, 32-24. Author(s): H.A. Haenni
Traceability of gemstones: challenges and opportunities
Traceability of gemstones: challenges and opportunities. Published in IGC 2017 Namibia Abstract Proceedings, 140-141. Author(s): L.E. Cartier, M.S. Krzemnicki, H.A.O. Wang, H.A. Haenni
Sannan-Skarn, ein neuer Schmuckstein aus Pakistan
Sannan-Skarn, ein neuer Schmuckstein aus Pakistan – Sannan-skarn, a new gemstone from Pakistan. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 2016, 65, 1-2, 41-46. Author(s): H.A. Haenni, L. Franz
Zircon – A very old gemstone
Zircon – A very old gemstone. Published in Journal of Gemmological Association of Hong Kong GAHK, 2016, 37, 37-41. Author(s): H.A. Haenni
Ruby heat treatment and fracture repair
Ruby heat treatment and fracture repair. Published in Jewellery News Asia, 2001. Author(s): H.A. Haenni
Modern Doublets from Germany and India
Modern Doublets from Germany and India. Published in Journal of Gemmology, 2015, 34, 6, 479-481. Author(s): H.A. Haenni, U. Henn