bauxite

This term refers specifically to the raw mineral ore from which aluminum is refined. It is characterized by its presence in tropical or subtropical regions where intense weathering of silicate rocks occurs, resulting in a reddish-brown or grayish clay-like deposit. As a mass noun, it describes the material in bulk. While it can be used in a countable sense when referring to specific types or deposits of the ore, it is predominantly treated as an uncountable substance in industrial and geological contexts.