| | Book (edition) | largest part of the world's supply comes; Passau district in Bavaria; southern Bohemia; Korea; Madagascar;...mines of Saxony; also Andreasberg, Harz Mts., Germany; Joachimstal and Pfibram, Bohemia; in Hungary;...Sala in Sweden; Andreasberg in the Harz Mts., Germany; Allemont, Dauphine, France; Pfibram, Bohemia;...in gneiss and other crystalline rocks and clay slate, accompanying various ores of silver, cobalt, lead...at Monroe, Conn.; Brewer's mine, Chesterfield district, S. C.; near Cummins Abundant with silver ores |
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Slate quarries, Lehesten, Saalfeld-Rudolstadt District, Thuringia, Germany