The keel bone is a bone fossil of a large animal tens of thousands of years ago. It is the fossil of the bones of ancient mammals such as elephants, rhinos, three-toed horses, etc.
After collecting and digging out, remove the soil and impurities. Five-flower keel bones are crispy and are easily broken when exposed to the air after being unearthed. They are often pasted with raw edge paper.
Medical material ① Five-flowered keel
Also known as: Qinghua keel, flowered keel. They are irregular blocks of varying sizes. The whole body is light yellowish white, with blue-gray and reddish-brown patterns, varying in depth and thickness. The surface is smooth with occasional small cracks. The cross section is rough, hard and brittle, and easily peels off and broken into pieces. It is highly hygroscopic and has suction when licked with the tongue. Odorless and tasteless. The ones that are crisp, layered, have five-color patterns and have strong hygroscopicity are better.
②Dragon Bone
Also known as: White Dragon Bone ("Qianjin Prescription"). It is an irregular block with different sizes. The surface is white, off-white or yellow-white, relatively smooth, and some may have textures and cracks, or brown stripes and spots. It is hard in texture, uneven in cross-section, white in color, and as fine as powder. It also has strong hygroscopicity. Odorless and tasteless. The ones with hard texture, white color and strong hygroscopicity are preferred. But generally the five-flowered keel is the best.
Produced in Henan, Hebei, Shanxi, Shaanxi, Shandong, Inner Mongolia, Hubei, Sichuan, Yunnan, Guangxi, Qinghai and other places.
The main chemical components are calcium carbonate and calcium phosphate, and also contain iron, potassium, sodium, chlorine, sulfate, etc.
Cooking the keel: Brush the soil and break it into pieces. Forging the keel: Take the cleaned keel and forge it until red on a smokeless fire or in a crucible, take it out, let it cool, and crush it.