The emeralds of Fazenda Boa Esperanca, Taua, Ceara, Brazil: occurence and properties
Author(s) : -
Date : 1988
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