Mineral: Calcite, Sphalerite, Chalcopyrite and Fluorite
Locality: Mixon Mine, Onecote, Staffordshire Moorlands District, Staffordshire, England / United Kingdom
Dimensions: Field of view ~ 35 mm

Description: Part of a cavity in limestone lined with reddish-brown sphalerite overgrown by fluorite, chalcopyrite and calcite.

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