Mica is a group of sheet silicate minerals characterized by their unique layering and flexibility. It is composed of potassium, aluminum, magnesium, iron, and silica, and it belongs to the phyllosilicate subclass of minerals. Mica minerals are known for their excellent electrical and thermal insulating properties, as well as their resistance to heat, light, and chemicals. There are several types of mica, but the most common are muscovite, biotite, and phlogopite.
Types of Mica:
Formation: Mica minerals are formed through the alteration of other minerals, such as feldspar. The alteration process involves the replacement of certain elements in the mineral structure.