Mica is a very common rock-forming mineral, widely distributed in crystalline rocks. Its general chemical formula can be expressed as:

Synthetic 120 mesh :large particle size, with pearl shining effect.

Using mica powder to color concrete offers several advantages over other coloring methods. First, mica powder is highly stable, meaning it won't fade or degrade over time, ensuring that the color remains vibrant for years to come. Whether you're coloring concrete countertops, flooring, outdoor patios, or decorative sculptures, mica powder provides a durable, long-lasting color that resists wear and tear.

Layer upon layer of mica

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.

A group of parallel cleavages can be seen in a photograph of biomica under orthogonal polarized (left) and single polarized (right) mirrors.