Fluorite & Siderite
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West Boltsburn Mine, Rookhope, Weardale, Co. Durham, England
1937
First generation fluorite crystals have been richly coated with siderite adopting the underlying cubic shapes. A second generation of fluorite has formed subsequent to the siderite with a dominant double crystal (33x18x18mm) perched on top of the specimen with smaller ones scattered on the siderite. Unusual and interesting specimen from West Boltsburn mine. One crystal edge has a small contact point.
Formulas:Fluorite CaF2; Siderite Fe2+CO3
Status: Sold
Dimensions: 95x85x60mm
Size: Small Cabinet (S)
Minerals of the English Midlands
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