X represents large interlayer cations, such as K+, Na+, Ca2+, Ba2+, Rb+, Cs+, etc. Y represents octahedral cations, such as Al3+, Fe2+, Mg2+, Cr3+, Ti4+, Fe3+, etc. Z is mainly Si4+ and Al3+; The ideal ratio of the additional anion (OH)- to (O)2- is 2:10, and (OH)- can be replaced by F- and Cl-. Most mica contain 4% to 5% water. Therefore, although they may be called mica, the chemical composition of different mica may be very different, for the purpose of research, we collectively refer to the minerals with this type of characteristics as mica group minerals.  

Additionally, pearl pigments are utilized in industrial applications, such as adhesives, plastics, and coatings, where a decorative yet functional element is desired. This broad industrial application demonstrates the adaptability of pearl pigments across various fields.

The extraction and use of muscovite, like any natural resource, come with environmental and societal considerations. It is crucial to adopt sustainable mining practices that minimize environmental degradation, protect biodiversity, and ensure the well-being of local communities.