Emeralds from Asia : Pakistan, Afghanistan and India : historically significant deposits Emerald : the most valuable beryl : the most precious gemstone Schwarz, D. /Giuliani, Gaston PETROGRAPHIE MINERAL BERYLIUM MINE REPARTITION GEOGRAPHIQUE HISTOIRE ECONOMIQUE Lapis International /Giuliani, Gaston (ed.) Jarnot, M. (ed.) Neumeier, G. (ed.) Ottaway,T. (ed.) Sinkankas, J. (ed.) Staebler, G. (ed.) 2002 text https://www.documentation.ird.fr/hor/fdi:010030130 fdi:010030130 Schwarz D., Giuliani Gaston, . Emeralds from Asia : Pakistan, Afghanistan and India : historically significant deposits. In : Giuliani Gaston (ed.), Jarnot M. (ed.), Neumeier G. (ed.), OttawayT. (ed.), Sinkankas J. (ed.), Staebler G. (ed.), . Emerald : the most valuable beryl : the most precious gemstone Lapis International, ; 2). 2002, 60-63 EN PAKISTAN AFGHANISTAN INDE