On corundums from Umba, Tanzania
Author(s) : -
Date : 1987
On corundums from Umba, Tanzania. Published in Journal of Gemmology, 1987.
Author(s): H.A. Haenni
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Tag : Sapphire
Glass-like fillings in rubies and sapphires
Author(s) : -
Date : 1986
Glass-like fillings in rubies and sapphires. Published 1986.
Author(s): H.A. Haenni
Korunde aus dem Umba-Tal, Tansania
Author(s) : -
Date : 1986
Korunde aus dem Umba-Tal, Tansania. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1986.
Author(s): H.A. Haenni
Naturally-coloured and treated yellow and orange-brown sapphires
Author(s) : -
Date : 1983
Naturally-coloured and treated yellow and orange-brown sapphires. Published in Journal of Gemmology, 1983.
Author(s): K. Schmetzer, G. Bosshart, H.A. Haenni
Naturfarbene und behandelte gelbe und orange-braune Sapphire
Author(s) : -
Date : 1982
Tags : Behandlung / Sapphire
Naturfarbene und behandelte gelbe und orange-braune Sapphire. Published in Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1982.
Author(s): K. Schmetzer, G. Bosshart, H.A. Haenni