Element intelligence · updated July 2026
The densest
of the elements.
A clear, considered guide to osmium — its remarkable properties, uncommon applications, and the science behind one of nature’s rarest metals.
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ATOMIC NUMBEROs8
GROUP
ATOMIC NUMBEROs8
GROUP
Os
Osmiumos·mi·um / ˈäzmēəm
Solid · 20°CAtomic mass190.23u
Density22.59g/cm³
Melting point3,033°C
Natural abundance0.0001%
01 / At a glanceSmall supply.
Small supply.
Outsize character.
Osmium is a hard, blue-gray transition metal in the platinum group. Rare, dense, and exceptionally wear-resistant, it occupies a singular place in materials science.
View all properties →Signature propertiesRelative scale
Did you know? Osmium is almost twice as dense as lead — a sugar-cube-sized piece weighs about 23 grams.
02 / Where it mattersMade for the
Made for the
exceptional.
Keep exploringOne element.