Complex structure (cf. La Redonde) in Velay granite and migmatites.
Tectonic hypersilicified and hydraulic hypersilicified kilometric formation, with a big lens of barite-fluorite formation beside.
The barite-fluorite formation is lately replaced by quartz+sulphides.
A secondary barite-fluorite vein cuts across the main lens.
Mineral List
13 entries listed. 10 valid minerals.
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