Mica Mineral is one of the wonderful gifts of nature that can be sliced up to 0.25 millimeters in thickness and is found in pegmatite typically in book form. Chemically speaking, mica is an aluminum silicate with some crystallization water that contains one or more of the following elements: potassium, sodium, magnesium, lithium, vanadium, and iron. Muscovite and paragonite are the two species with the greatest commercial value. Both dry ground mica and wet ground mica are options for it.