Abstract
WHAT may prove to be a new mineral has been obtained from the Du Toits Pan Mine at Kimberley. The material is in two forms: irregular pieces up to half a pound in weight, and small round pellets, which, collected together in a heap, would be mistaken for mixed shot. Some specimens are dull like lead on the outside, while others have a resemblance to polished nickel. The prevailing inside texture is spongy-looking. Under the microscope some of the surfaces are seen to be pitted with holes where the spongy texture reaches the surface. On the other hand, some of the larger pieces have wrinkled surfaces, not pitted; others have bright surfaces intersected with tiny cracks. Many of the specimens are covered with a blackish coating of about the thickness of paint. This is probably graphite; it scrapes off easily enough.
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SUTTON, J. A New Mineral?. Nature 87, 314 (1911). https://doi.org/10.1038/087314a0
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DOI: https://doi.org/10.1038/087314a0
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