Which crystal structure do the majority of minerals have?

The majority of minerals exhibit a crystalline structure known as the isometric (or cubic) crystal system, which includes common forms such as halite and pyrite. However, many minerals also crystallize in other systems, such as tetragonal, hexagonal, and orthorhombic. The specific crystal structure of a mineral is determined by its chemical composition and the conditions under which it formed. Overall, while there is diversity in crystal structures, the isometric system is particularly prevalent.