Lead, copper, zinc, barite, haematite, tungsten, graphite, fluorite, and coal have all been mined at different times since as early as the 12th century.
en.wikipedia.org Well-known minerals containing yttrium include gadolinite, xenotime, samarskite, euxenite, fergusonite, yttrotantalite, yttrotungstite, yttrofluorite (a variety of fluorite), thalenite, yttrialite.
en.wikipedia.org It occurs associated with aegirine, riebeckite, barite, fluorite, albite, phlogopite and magnetite.
en.wikipedia.org Some of the fluorite was true chlorophane and exhibited a brilliant green light when strongly heated and viewed in the dark.
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