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Meet the world’s rarest mineral. It was found only onceToday, the sole specimen resides in the Natural History Museum of Los Angeles County, where it is safeguarded as a geological ...
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World's rarest gemstone: What it looks like and its costThe unique specimen is currently housed in the Natural ... Why it is so rare The main components of kyawthuite are bismuth and antimony. These are metals that, while not commonly found, are ...
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