Osmium is one of the rarest and hardest metals in the world. It is a hard, brittle, bluish-white transition metal in the platinum group of the periodic table. It is the densest naturally occurring element, with a density of 22.
Osmium is one of the rarest and hardest metals in the world. It is a hard, brittle, bluish-white transition metal in the platinum group of the periodic table. It is the densest naturally occurring element, with a density of 22.