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Blue John : Properties, Formation, Locations » Geology Science Blue John is a rare and highly valued mineral found only in the Blue John Cavern and Treak Cliff Cavern in Castleton, Derbyshire, England It is a form of fluorspar, a halide mineral composed of calcium fluoride (CaF2), often with impurities that give it its distinctive bands of colors, ranging from purples and blues to yellows and browns
Blue John Meaning: Healing Properties, Benefits and Uses Blue John is a renowned stone that is a semi-precious mineral It is also known as Derbyshire Spar Basically, Blue John is one of the rarest forms of fluorite that comes with bands of purple-blue or yellowish shade and the chemical formula is CaF2 This Blue John is found only in the Blue John Cavern and Treak Cliff Cavern in Derbyshire
Blue John (mineral) explained What is Blue John (mineral)? Blue John is a semi-precious mineral, a rare form of fluorite with bands of a purple-blue or yellowish colour
Blue John - Cosmic Nudge Historical and Geological Background: Blue John is a rare variety of fluorite found exclusively in Derbyshire, England, particularly in the Blue John Cavern and Treak Cliff Cavern Its name is believed to come from the French term bleu-jaune (blue-yellow), describing the stone’s distinctive bands of colour
Blue John Fluorite: Identification, Uses, and Meaning - Yes Dirt Blue John Fluorite is one of the rarest and most expensive types of fluorite in the world Coming only from a single location in the UK, it brandishes a beautiful bluish-purple color with bands that can be white or yellowish alongside darker blue-purple bands It’s a highly valuable mineral for its opulence in decorative and ornamental designs The purple color is a mystery, no one quite