Uranium is not a rock, but a radioactive metal. It's found in various minerals, which are then extracted and processed to obtain uranium for use as fuel in nuclear power plants.

Here are some common minerals containing uranium:

* Uraninite: A black, dense mineral that is the most common uranium ore.

* Pitchblende: A variety of uraninite with a pitch-black color and dull luster.

* Carnotite: A yellow, powdery mineral that contains both uranium and vanadium.

* Autunite: A fluorescent, bright green mineral that contains uranium and phosphorus.

These minerals are found in various types of rocks, including:

* Igneous rocks: Formed from the cooling and solidification of magma or lava.

* Sedimentary rocks: Formed from the accumulation and cementation of sediments.

* Metamorphic rocks: Formed by the transformation of existing rocks under high pressure and temperature.