Biotite Schist

Primarily produced in the Chu'nan region of Zhejiang, as well as Hunan and Hubei.

Scale-like or flake-like aggregate lumps. Irregular flat flake-like or long oblique lumps, no obvious ridges. Brownish-black or greenish-black, with glass-like luster. Soft texture, easily broken, fractured surface is obviously layered. Powder is often greenish-black scales (black mica), with star-like shiny luster. faint odor, tasteless.

Superior medicinal material has star spots, grayish-green color.

Salty, sweet, neutral

Downbears phlegm and qi, calms liver, settles fright. Apply to chronic phlegm stasis, coughing and panting, epilepsy, irritability and chest tightness, and convulsion. Often produced in pills.

‘Bright silver star’: this refers to the crystal of some components precipitated out on the medicinal material surface, when examined under lights, shiny luster can be seen.