(Steinbruch Birkhöhe, Stadtzentrum, Zwiesel, Bayerischer Wald, Niederbayern, Bayern, Deutschland)
Ancient quartz quarry in a pegmatite, that has now disappeared under building developments.
Ref.:
- Der Aufschluss 1973(2), 38-42
- S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
Mineral List:10 entries listed. 6 valid minerals. 1 type locality (valid mineral).
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