Identification of raw herbs
It is a long bar or a flat bar and is of different sizes. All milky white, greenish white to grayish gray, or the formation of a white and blue and white vertical pattern, sometimes with yellow-brown, shiny. Weight and texture soft, easy to peel, cross-section was fibrous, easy to split vertically, broken after the filamentous, silk cotton soft and smooth. It is elastic, sticky to the skin, itchy, and difficult to remove. No odor. Needle-like, gray and white, easy to break the better. Burning in the flame turns red and does not melt. After leaving the fire, the burned part turns slightly yellow, and when the torch burns, it is infusible and does not conduct heat. Insoluble in acid. In addition to the above-mentioned authentic products, Actinolitum brevifibrum is still used as a stone in Sichuan, Hubei, Shandong, Henan, and Beijing. The original mineral of the stone is talc, a short-fiber asbestos ore with a dense scale-like to coarse scale. It is generally green or gray to white. The hardness is particularly small and it feels smooth. It is a product of layers, often associated with Yang Qi. This ore is almost entirely made of talc. In addition, it often contains carbonate (siderite), chlorite, mica and a small amount of other minerals. Medicinal products are irregularly shaped and of varying sizes, all of which are silver-white and slightly green. Glossy, smooth surface and not flat, cross-sectional layer pattern. Soft and loose, fragile, can be smashed into thin scales or short fibers by hand. The powder is attached to the hands with a smooth feel and is not easily dropped. It will not burn with red, but easy to heat transfer. Gas slightly, tasteless. Medicinal powder red fine use. Microscopic identification: This product under the polarizer: the colorless transparent sheet, or very light green, columnar or fibrous. Zhongzheng is protruding. Inclined extinction, extinction angle (c∧Ng) of 13°-18°; a few parallel extinction; symmetrical cross-section surface extinction. The interference color is secondary green. We are extending the symbol. Biaxial crystals. Negative light. The optical axis angle is larger.
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