Marcasite
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Ullcoats mine, Egremont, Cumbria, England
1351
To the surface of a calcite matrix embedded marcasite crystals shows clear twinning about a single axis line. Unusual and interesting specimen.
Formula: Marcasite FeS2 ; Calcite CaCO3
Status: Sold
Dimensions: 75x42x34mm
Size: Small Cabinet (S)
Barite pseudomorph after Alstonite
The Mineral World of John Ruskin
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