Unstable Colouration of Padparadscha-like Sapphires
Author(s) : -
Date : 2018
Unstable Colouration of Padparadscha-like Sapphires. Published in Journal of Gemmology, 2018, 36(4), 346-354.
Posts of : A. Klumb
SSEF fieldtrip to Paraiba, Brazil
Author(s) : -
Date : 2018
Presentation given by Alexander Klumb at 2018 Swiss Gemmological Society conference on an SSEF fieldtrip to the Paraiba region of Brazil.
Author(s) :H.A.O. Wang, S. Haensel, A. Klumb