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Wednesday, December 28, 2022

Rhodium Is Earth's Rarest and Most Expensive Precious Metal

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Discovered in the early 1800s from a chunk of smuggled platinum ore, rhodium is the most valuable precious metal on the planet today, used mainly for keeping car emissions in check.

from HowStuffWorks - Learn How Everything Works! https://ift.tt/2gLAm7X

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