In addition, lepidolite and ferrolepidolite can also be used as mineral raw materials for extracting lithium.

For example, the safe operation of high-speed rail cannot be separated from the escort of mica products.

Take pearlescent pigments as an example, pearlescent pigments are a class of pigments with pearl luster, which are deposited on the substrate (generally natural mica, synthetic mica, glass sheet and other sheet-like materials) above a layer or alternately deposited multiple layers of metal oxides or non-metallic oxides and formed a flat sandwich body with a structure similar to sandwich. Due to the difference in refractive index between the substrate and the oxide deposited on its surface and each oxide, when the light shines on the surface of the pearlescent pigment, the incident light will be refracted and reflected at the interface of each layer of the pearlescent pigment, and the color of the pearlescent pigment that people see is the result of the superposition of light after multiple refractions and reflections of the light, that is, the interference phenomenon of light.

Mica is a naturally occurring silicate mineral that is found in various forms, most commonly as muscovite and phlogopite. When ground into fine powder and processed, it becomes the foundation for pearlescent pigments. These pigments are typically created by layering titanium dioxide or iron oxide on the surface of the mica flakes. This process enhances their reflective properties and creates the stunning luster that is characteristic of pearlescent pigments.