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Named for the type locality at the Rosas mine in Sardinia, Italy. Few worldwide localities including, additionally, England, Namibia, the USA, and Mexico and can be found in small amounts in other locations. Rosasite is an uncommon mineral that forms in the secondary oxidized zone of copper-zonc deposits that have formed by zinc solutions reacting with copper minerals. Rosasite may also be of post-mine origin.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/rosasite.pdf


Named after German mineral collector Walter Roscher. Roscherite can be found in granite and pegmatite cavities in localities including Germany, England, Brazil, and the USA including at the Tip Top mine here in Black Hills of South Dakota.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/roscherite.pdf

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