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Mariposite

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Mariposite is a mineral which is a chromium-rich variety of mica, which imparts an attractive green color to the generally white dolomitic marble in which it is commonly found. It was named for Mariposa, California, though it can be found in several places in the Sierra Nevada mountains. It is also found in Marblemount, Washington in the North Cascades. It is also found in a few locations in Newfoundland, Canada, where it is called virginite, and in Europe. It is not an officially classified mineral, but is a chromium-rich phengite, which is a high silica variety of muscovite. It is the chromium that gives it its distinctive green color. The term "mariposite" also refers to the stone in which the green mica is found. This stone is metamorphic rock, containing varying amounts of dolomite…

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