Blue John: Remarkable fluorite from a limestone cavern

📄 Print or Save to PDF 📄 2 Column Steven Wade Veatch (USA) Blue John stone is the name given to banded fluorite found in the Castleton area of Derbyshire in England (Ollernshaw, 1964). It has been prized for centuries. Chemically, it is a calcium fluoride (CaF2) and occurs in…


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