Why epoxy-filled emeralds must be accepted
Why epoxy-filled emeralds must be accepted. Published in 1993. Author(s): H.A. Haenni
Glassy fillings: a loupe just isn’t enough
Glassy fillings: a loupe just isn’t enough. Published in ICA Gazette, 1993. Author(s): H.A. Haenni
Filled emeralds: please face reality
Filled emeralds: please face reality. Published in ICA Gazette, 1993. Author(s): H.A. Haenni
New fracture-filling materials have replaced oil
New fracture-filling materials have replaced oil. Published in ICA Gazette, 1992. Author(s): H.A. Haenni
Identifications des fissures traitées
Identifications des fissures traitées. Published in Revue A.F.G., 1992. Author(s): H.A. Haenni
Identification of fissure-treated gemstones
Identification of fissure-treated gemstones. Published in Journal of Gemmology, 1992 Author(s): H.A. Haenni
Erkennung von Edelsteinen mit behandelten Rissen
Erkennung von Edelsteinen mit behandelten Rissen. Published in GZ, 1992 Author(s): H.A. Haenni
Wenn es ein Ölfeld im Garten gibt
Wenn es ein Ölfeld im Garten gibt. Published in Schweizer Uhren- und Schmuck-Journal, 1988. Author(s): H.A. Haenni
Lorsqu’il y a de l’huile dans le jardin
Lorsqu’il y a de l’huile dans le jardin. Published in Journal Suisse d’Horlogerie et Bijouterie, 1988. Author(s): H.A. Haenni
Origin of the cat’s eye effect in heat-treated zircons from Sri Lanka
Origin of the cat’s eye effect in heat-treated zircons from Sri Lanka. Published in Journal of Gemmology, 1988. Author(s): H.A. Haenni, M. Weibel