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Which metals are the rarest in the world and how are they extracted
Which metals are the rarest in the world and how are they extracted

Recent studies have shown that californium, scandium, and plutonium are the rarest metals in the world. Californium, for example, is one of the most expensive rare metals, with a price that can reach 9 million dollars per gram. Scandium, although it occurs in ores, is present in insignificant quanti...

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