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Except for occasional market fluctuations, rhodium bullion is the most expensive precious metal in today's economic climate. With important technological discoveries and advancements requiring the use of the platinum group metals (PGMs), rhodium prices have soared to staggering levels in the past five years. The history of rhodium, whose chemical symbol is Rh and atomic number is 45, stretches back two hundred years to the beginnings of the nineteenth-century, another exciting time of scientific achievement in several different fields.
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