Natural mica powder. High grade, good quality. The only origin for detrital mica all over China. Heat resistance, insulation. Mica is mainly crystallized into monoclinic crystal, it is thin leave six-party flake, flake, tabular or sometimes six-party colum, and Hardness of2-3, the proportion of 2.70-3.20, a loose density of 0.3-0.5. The refractive index of Mica increases with the increased iron ...