• Blue John - slices

    Fluorite – Natural, Other, Purple

    A craftsman at the Treak Cliff Cavern workshop in Derbyshire, England placed slices of Blue John, too thin for jewelry, on his window. Photo by Andy Mabbett. Licensed under CC By-SA 3.0. (Cropped to show detail).

    Article: Fluorite Value, Price, and Jewelry Information

    Credit: Andy Mabbett

    Natural or man madeNatural
    OriginUnited Kingdom
    Origin detailsDerbyshire, England
    Gem StateOther