
Origin determination for gemstones: possibilities, restrictions, reliability
Origin determination for gemstones: possibilities, restrictions, reliability. Published in 1993.
Author(s): H.A. Haenni
Origin determination for gemstones: possibilities, restrictions, reliability. Published in 1993.
Author(s): H.A. Haenni
Reliability of origin determinations for gemstones. Published in Gemological Digest, 1990.
Author(s): H.A. Haenni
A contribution to the distinguishing characteristics of sapphires from Kashmir. Published in Journal of Gemmology, 1990.
Author(s): H.A. Haenni
Certitude de la détérmination d’origine. Published in Revue AFG, 1989.
Author(s): H.A. Haenni
The emeralds of Fazenda Boa Esperanca, Taua, Ceara, Brazil: occurence and properties. Published in Journal of Gemmology, 1988.
Author(s): D. Schwarz, H.A. Haenni, F.L. Martins Jr, M. Fischer
The emeralds from the Belmont Mine, Minas Gerais, Brazil. Published in Journal of Gemmology, 1987.
Author(s): H.A. Haenni, D. Schwarz, M. Fischer