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5 most expensive metals and countries they are mined
Among the four major precious metals—gold, silver, platinum, and palladium—it is the most expensive and rarer than platinum.
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Neither gold nor diamonds, the most expensive metal is worth 27 million euros a gram
Californium, a metal first synthesized in 1950, is the world's most expensive material due to its extreme rarity and its applications in medicine, industry and security. The metal, first ...