
Age dating applied as a testing procedure to gemstones and biogenic materials (2019)
Presentation by Dr. Michael S. Krzemnicki at IGC 2019 in Nantes, France.
Presentation by Dr. Michael S. Krzemnicki at IGC 2019 in Nantes, France.
News from the SSEF Lab. 2018 Swiss Gemmological Society conference. Presentation by Dr. Michael Krzemnicki
Asterism in beryl, aquamarine and emerald- an update. Published in Journal of Gemmology, 2004.
Author(s): K. Schmetzer, L. Kiefert, H.A. Haenni
Der Binntal Smaragd als Juwel. Published in Schweizer Strahler, 2003.
Author(s): M.S. Krzemnicki, G. Bosshart
Emerald treatments: their effects and how to recognize them. Published in 2001.
Author(s): L. Kiefert
The colour of Igmerald: I.G. Farbenindustrie flux-grown synthetic emerald. Published in Journal of Gemmology, 1998.
Author(s): K. Schmetzer, L. Kiefert
New fracture-filling materials have replaced oil. Published in ICA Gazette, 1992.
Author(s): H.A. Haenni
Blue-green emerald from Nigeria (a consideration of terminology). Published in Australian Gemmologist, 1992.
Author(s): H.A. Haenni
The case for blue-green emerald. Published in Jewellery News Asia, 1991.
Author(s): H.A. Haenni
Reliability of origin determinations for gemstones. Published in Gemological Digest, 1990.
Author(s): H.A. Haenni