What is the rarest metal on earth?

One of the densest elements on Earth, osmium is a bluish-silver metal. This very hard, brittle metal has an extremely high melting point. Largest producers: Parts of Russia and North and South America. read more

Gold is indeed considered to be a rare metal – 5,000 tons of the Earth provides only about 20 grams of gold – but many other metals are much rarer. TL;DR (Too Long; Didn't Read) In terms of abundance in the Earth’s crust, the rarest metal is francium, as there's less than 1 ounce in the world at any given time. read more

Identified in 1925, rhenium was the last stable element discovered. It is also one of the rarest elements on earth. The main mineral source for rhenium is molybdenite. Chile is the world’s largest producer of rhenium from its porphyry copper deposits. Rhenium, like the PGM minerals is rare on earth compared to the rest of the universe. read more