Minerals / Brochantite, Geufron. (CWO)

Brochantite, a cupric sulphate mineral,Cu4SO4(OH)6.  Geufron mine, Central Wales Orefield. This sulphate mineral is a secondary mineral of copper, which along with lead was a product of the mine. The specimens were recovered from the spoil heaps at the mine, and are random growths of very small crystalline brochantite embedded in loosely cemented debris.

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