TY JOUR TI Impurity composition of beryl from spodumene pegmatites of Pashki deposit (Nuristan province, Afghanistan) KW Pashki deposit KW beryl KW aquamarine KW spodumene pegmatites KW SIMS method KW trace elements KW search and evaluation criteria JO Vestnik of geosciences AU Skublov, S.G. AU Hamdard, N.. AU Ivanov, M.. AU Gavrilchik, A.K. AU Stativko, V.S. PY 2024 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"