Tags: Chemical Substance, Mineral.

Barstowite formula Pb4[Cl6CO3]•H2O is a transparent to white mineral in the monoclinic system. It has a Mohs hardness of 3 a white streak and an adamantine lustre.The type locality for Barstowite is Bounds Cliff St Endellion Cornwall in the United Kingdom. It is named after Richard W. Barstow (1947–1982) a Cornish mineral collector.

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