fluorspar

fluorspar or fluor (ˈflʊəˌspɑː)

—n
	Also: fluorite a white or colourless mineral sometimes fluorescent and often tinted by impurities, found in veins and as deposits from hot gases. It is used in the manufacture of glass, enamel, and jewellery, and is the chief ore of fluorine. Composition: calcium fluoride. Formula: CaF₂. Crystal structure: cubic

fluor or fluor

—n

Collins English Dictionary - Complete & Unabridged 10th Edition
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fluorspar

flu·or·spar