New fracture-filling materials have replaced oil
Author(s) : -
Date : 1992
New fracture-filling materials have replaced oil. Published in ICA Gazette, 1992.
Author(s): H.A. Haenni
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Research Library
Identifications des fissures traitées
Author(s) : -
Date : 1992
Identifications des fissures traitées. Published in Revue A.F.G., 1992.
Author(s): H.A. Haenni
Identification of fissure-treated gemstones
Author(s) : -
Date : 1992
Identification of fissure-treated gemstones. Published in Journal of Gemmology, 1992
Author(s): H.A. Haenni
Erkennung von Edelsteinen mit behandelten Rissen
Author(s) : -
Date : 1992
Erkennung von Edelsteinen mit behandelten Rissen. Published in GZ, 1992
Author(s): H.A. Haenni
Considérations terminologiques au sujet des émeraudes du Nigéria de couleur bleu-vert
Author(s) : -
Date : 1992
Considérations terminologiques au sujet des émeraudes du Nigéria de couleur bleu-vert. Published in Revue A.F.G., 1992.
Author(s): H.A. Haenni
Blue-green emerald from Nigeria (a consideration of terminology)
Author(s) : -
Date : 1992
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
Author(s) : -
Date : 1991
The case for blue-green emerald. Published in Jewellery News Asia, 1991.
Author(s): H.A. Haenni
Rubine vom Burma-Typ aus der Gegend von Morogoro in Tansania
Author(s) : -
Date : 1991
Rubine vom Burma-Typ aus der Gegend von Morogoro in Tansania. Published in GZ, 1991.
Author(s): H.A. Haenni
From Nigeria – new pale gem-quality emerald or beryl?
Author(s) : -
Date : 1991
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From Nigeria – new pale gem-quality emerald or beryl? Published in 1991.
Author(s): H.A. Haenni
Edelsteine der Korundgruppe
Author(s) : -
Date : 1991
Edelsteine der Korundgruppe. Published in Schweirische Uhrmacher- und Goldschmiede Zeitung, 1991.
Author(s): H.A. Haenni