CAVRADI, SWITZERLAND
Among the few black minerals eagerly sought by mineral collectors are the lustrous futile from Graves Mountain, Georgia; manganite from Ilfeld, Germany: and hematite from the Alpine countries. Prices for the best of these can be surprisingly high and the competition for their acquisition fierce. Interestingly, these species are common ore minerals of titanium, manganese, and iron, respectively, and it is somewhat surprising that, although sites producing good ...