calcite

calcite

(notes to the classic of Materia Medica)

Another name is Huangshi.

[source] the ore is carbonate calcite.

Calcite

It is a cubic system. The crystals are rhombohedral, columnar and plate-shaped. The aggregate usually occurs as a bell shaped or dense granular body. Most of the colors are colorless or milky white. If there is a mixture, it will be dyed into gray, yellow, rose, red, brown and other colors. With glassy luster. Transparent to opaque. It has complete cleavage and can split in three different directions. The section is conchoidal. Hardness 3. The specific gravity is 2.6-2.8. It is widely distributed and is an important part of endogenetic hydrothermal veins and sedimentary carbonate rocks.

[collection] remove the soil and miscellaneous stones after harvesting.

[medicinal materials] most of them are irregular massive crystals, often in the shape of rhombic column, with edges and corners, colorless or yellowish white, transparent to opaque, smooth surface and glassy luster. It is hard and easy to break. The fragments are square or rectangular. The air is weak and the taste is light. White, transparent and fragile are preferred. When burned with a blowpipe flame, it decomposes into calcium oxide and carbon dioxide gas, which enhances the brightness of the flame and dyes it orange red. When hydrochloric acid is added, carbon dioxide bubbles will occur.

Produced in Henan, Hebei, Sichuan, Hunan, Anhui, Jiangxi and other places.

[processing] wash, dry and smash into small pieces.

[Xing Wei] bielu: "bitter and pungent, cold, non-toxic. "

[function and indications] bielu: "it is used to keep heat and Qi in the chest, jaundice and unblock the blood vessels. "

[usage and dosage] oral administration: decoction, 3-5 yuan; or powder.

[taboo] notes to the classic of materia medica: "Croton. "