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ACKNOWLEDGMENTS
I thank R. Peter Richards for having a look at the Australia Hill specimen, so many years ago, and for creating the drawings in and . I thank John Jaszczak, Justin and Doug Bank, and Klaus Schäfer for the use of their images. I am very grateful for the reviews by and discussions with R. Peter Richards, John Jaszczak, and John Rakovan; their invaluable guidance made the article much more accurate and understandable.
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Mark Mauthner
Mark Mauthner is a consulting editor of Rocks & Minerals and a freelance photographer living in Austria.
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