There are a few minerals that exhibit 4 directions of cleavage, but the most common and easily recognizable is Fluorite (CaF2).

Fluorite is known for its perfect cubic cleavage, meaning it breaks along four planes at 90-degree angles, forming cube-shaped fragments.

Here are a few other minerals that can exhibit 4 directions of cleavage:

* Halite (NaCl): Also known as rock salt, halite has cubic cleavage, similar to fluorite.

* Galena (PbS): This mineral has cubic cleavage but is less common than fluorite.

However, it's important to note that cleavage can be influenced by factors like impurities and crystal structure, so it's not always perfectly distinct.