Roeblingite

This sample of roeblingite is displayed in the Smithsonian Museum of Natural History. Roeblingite contains calcium, manganese and lead with the composition Ca6MnPb2(Si3O9)2(SO4)2(OH)2.4H2O. This sample is about 6x6 cm and is from Franklin, New Jersey. It is described as a silicate, and more particularly as a cyclosilicate.

Mindat: Roeblingite

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