
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
On corundums from Umba, Tanzania. Published in Journal of Gemmology, 1987.
Author(s): H.A. Haenni
Glass-like fillings in rubies and sapphires. Published 1986.
Author(s): H.A. Haenni
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. Published in Journal of Gemmology, 1983.
Author(s): K. Schmetzer, G. Bosshart, H.A. Haenni
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