Osmium is a blue-gray, hard, and brittle metal. It has a metallic luster, similar to other heavy metals like platinum.

Here's a more detailed description:

* Color: Blue-gray with a slight bluish tint.

* Appearance: Shiny, with a metallic luster.

* Texture: Very hard and brittle. It can be scratched easily.

* Form: It is typically found in powdered form or as small, irregular pieces.

Keep in mind that osmium is a very dense metal, making it difficult to handle and work with. It is also very expensive, so it's not something you'd typically see in everyday life.