Emeralds of the world : notes on known emerald occurrences Emerald : the most valuable beryl : the most precious gemstone Grundmann, G. /Giuliani, Gaston PETROGRAPHIE MINERAL BERYLIUM ORIGINE GEOGRAPHIQUE ANALYSE QUANTITATIVE MINERALOGIE ROCHE HOTE Lapis International /Giuliani, Gaston (ed.) Jarnot, M. (ed.) Neumeier, G. (ed.) Ottaway, T. (ed.) Sinkankas, J. (ed.) Staebler, G. (ed.) Petrov, A. (trad.) Neumeier, G. (trad.) 2002 text https://www.documentation.ird.fr/hor/fdi:010030127 fdi:010030127 Grundmann G., Giuliani Gaston, . Emeralds of the world : notes on known emerald occurrences. In : Giuliani Gaston (ed.), Jarnot M. (ed.), Neumeier G. (ed.), Ottaway T. (ed.), Sinkankas J. (ed.), Staebler G. (ed.), Petrov A. (trad.), Neumeier G. (trad.), . Emerald : the most valuable beryl : the most precious gemstone Lapis International, ; 2). 2002, 24-35 EN MONDE