When evaluating stable, naturally occurring elements with the lowest concentration levels in the Earth's crust or annual extraction volumes, the top three rarest precious metals are rhodium, iridium, and osmium. These rare elements belong to the platinum group metals family. Rhodium is intensely scarce and valuable, widely utilized in automotive catalytic converters. Iridium is exceptionally corrosion-resistant and hard, while osmium holds the record for being the densest naturally occurring element on Earth.
1 votes
Marked as accepted