Sulphide-bearing hydrothermal quartz veins mined for Cu.
Ref.:
Nordrum, F.S. (1972): Contribution to the Mineralogy of Norway No.49. Wittichenite, Cu3BiS3, from Tokke and Fyresdal in West Telemark. Norsk Geologisk Tidsskrift 52: 257-271
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!