A pegmatite with several phases of sporadic activity: before WWII was worked for large "books" of mica, exported on horseback and oxcart; after WWII was worked for industrial beryl (approx. total 1,500 tons); then abandoned until tantalum became a pricy commodity, and so re-opened for its Ta-rich ferrocolumbite.
Mineral List:12 entries listed. 8 valid minerals.
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