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Malachite

Photo: Malachite nodules
Malachite from a Zambian mine seems to take the form of rounded peas. Found in deposits of copper ore, malachite gets its name from the Greek word for its leafy green color, which can range from light to dark green. The mineral malachite contains the elements copper, hydrogen, carbon, and oxygen.
Photograph by GC Minerals/Alamy

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