In terms of its optical properties, Perite is anisotropic which means the velocity of light varies depending on direction through the mineral (i.e. it is birefringent).

It is colorless in plane polarized light, and it is weakly pleochroic.

Perite is found in areas near igneous extrusions in places like the Western United States, Southern Australia, and scattered around Europe.

Therefore, perite has three mirror planes and three twofold rotation axes.

This article about a specific halide mineral is a stub.