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Wollastonite

Named for William Hyde Wollaston, the English mineralogist and chemist who is famous for discovering the elements palladium and rhodium.  These elements were discovered in the process of Wollaston’s development of a practical method of processing platinum ore. Additionally, Wollaston was the first to observe Fraunhofer lines in the solar spectrum which led to the detection of the solar elements and he is the inventor of the camera lucida, the goniometer, and the Wollaston prism. Wollastonite is common in contact metamorphosed carbonates, the intruding igneous rock, and the skarn along the contact between the two. It is a widely distributed mineral that can, on occasion, show a yellow cathodoluminescence.  

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

Wolsendorfite

Wolsendorfite, generally, and correctly, spelled Wölsendorfite, gets its name from its type locality at Wölsendorf, Bavaria, Germany. Wolsendorfite is a rare mineral that occurs as a product of alteration of uraninite in the oxidized zones of U-bearing deposits. Despite its rarity, it has several localities of occurrence including, of course, Germany, along with France, Italy, the Democratic republic of Congo, Canada, the USA, Greenland, Brazil, and Australia, among others.

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

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