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This sample of bayldonite is displayed in the Smithsonian Museum of Natural History. Bayldonite is an oxide (arsenate) which contains copper, zinc and lead and arsenic with the composition (CuZn)3Pb(AsO4)2(OH)2.H2O. This sample is about 5x6 cm and is from Tsumeb, Namibia. The bayldonite is formed with olivenite and adamite.
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