Halides are minerals composed of a metal cation and a halogen anion (such as fluoride, chloride, bromide, or iodide).

Here are some examples:

* Fluorite (CaF₂): This is a common fluoride mineral with a variety of colors.

* Halite (NaCl): This is table salt!

* Sylvite (KCl): Another common chloride mineral used as a potassium fertilizer.

Let me know if you have any other questions!