Many of the halide minerals occur in marine evaporite deposits.

Complex halide minerals may also have polyatomic anions in addition to or that include halides.

Two commercially important halide minerals are halite and fluorite.

The halide minerals are compounds where a halogen (fluorine, chlorine, iodine, and bromine) is the main anion.

Greisens appear as highly altered rocks, partly coarse, crystalline granite, partly vuggy with miarolitic cavities, disseminated halide minerals such as fluorite, and occasionally metallic oxide and sulfide ore minerals, borate minerals (tourmaline) and accessory phases such as sphene, beryl, topaz, etcetera.