Minerals / Calcite, Taffs Well.
Calcite, Calcium carbonate, CaCO3 This specimen is one of many collected from Taffs Well quarry, Cardiff , South Wales. There are several varieties of crystal to be found at this quarry. In this specimen the crystals are stubby and prismatic, with a pale cream colouration. The crystals have quite obvious horizontal striations, and are growing from a base of massive calcite.
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