osmium

Osmium is a very dense metal that is found in the Earth's crust. It is the densest natural element on Earth, and it is even denser than lead. Osmium is a hard metal that is difficult to melt or deform. It is also a very brittle metal, and it can shatter easily.

Osmium is used in a variety of applications, including:

• Making pens, because it is so dense that it does not wear down easily.
• Making electrical contacts, because it is a good conductor of electricity.
• Making jewellery, because it is a very attractive metal.

Osmium is a very hard and brittle metal.