A comparative study of Jadeite, Kosmochlor and Omphacite jades from Myanmar, and suggestions for a practical nomenclature. Published in the Journal of Gemmology, 2014, 34, 3, 210–229.
Author(s): L. Franz, T.T. Sun, H.A. Haenni, C. de Capitani, T. Thanasuthipitak, W. Atichat
A European gemmologist’s thoughts on jadeite jade. Published in GAHK Journal, 2007.
Author(s): H.A. Haenni
A short review of the use of ‘keshi’ as a term to describe pearls. Published in Journal of Gemmology, 2006.
Author(s): H.A. Haenni
Les pierres précieuses de A à Z: Réglementation du commerce des gemmes. Published in revue de la Fédération de l’industrie horlogère suisse FH, 2005.
Author(s): J.-P. Chalain
Les pierres précieuses de A à Z: le diamant et sa réglementation. Published in revue de la Fédération de l’industrie horlogère suisse FH, 2005.
Author(s): J.-P. Chalain
Orange treated sapphire: towards finding a name for a new product. Published in GAHK Journal, 2002.
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