Uranium ore (Fallout 2)

Uranium (atomic number 92, symbol U) is a radioactive element that forms the basis for most nuclear weapons. As such, it is not uncommon in the postwar wasteland. Chunks of uranium ore can be thrown at enemies for a small amount of damage, or can be refined and sold.

In-game description
A chunk of Uranium Ore, unrefined.

Location
The mine in Broken Hills is the only consistent source of uranium, though caravans sometimes carry it.