Uranium ore is a naturally occurring mineral composed of uranium and other elements. The two most common types of uranium ore are PITCHBLENDE (11 letters) and curite (6 letters). PITCHBLENDE is a black, radioactive mineral composed of uranium, lead, and other elements. Curite is a yellowish-brown mineral composed of uranium, lead, and other elements. Both minerals are mined for their uranium content, which is used in nuclear power plants and weapons.