Source? 1. keel: it is the skeleton fossil of ancient mammals, such as three-toed horse, rhinoceros and elephant.
2. Wuhua keel: it is an ancient mammal fossil similar to front teeth.
Origin and distribution? Location: Gansu, Shanxi, Qinghai, Ningxia, Inner Mongolia and other places. Sold all over the country and exported.
Identification point? The main differences between keel and Wuhua keel are as follows: the former is bony or fractured, white or grayish white, and some have textures or spots. The fracture at the joint is full of honeycomb holes, and the tongue is sticky or slightly sticky; On the other hand, Wuhua keel is cylindrical or irregular, smooth with five-color texture, easy to break, with no small holes in the section and no tongue sticking. They come from different sources, so their shapes are slightly different.
Classic appraisal? 1 Shennong Herbal Classic: "The keel tastes sweet and flat. The main confidant ghost note ... children with febrile convulsions and epilepsy ... was born in the valley. " 2 beams? Famous Doctor: "Born in the valley of Shanxi, and the dragon died in a cave beside the rock of Mount Tai. All the time. " Tao Hongjing said? "Today there are more beams, benefits and Pakistan. Bones want to get the backbone of the brain, just make a white brocade and lick your tongue. The teeth are small, with teeth, and the corners are solid and solid. All dragons shed their skins, but they didn't really die. Lei Xue said, "People in Cangzhou, Cangzhou and Taiyuan are the best. Women are good at writing and wide in writing, while men are thick in bone and narrow in writing. On five-color clothes, white, yellow and black. Don't use unclean menstruation or those picked by women. "5 Tang? Su Gong said, "I am going to Jin today. Rigid people are not good, and people with five colors are good. Its blue, yellow, red, white and black should also be in harmony with the viscera, such as five meridians, five meridians and five meridians, regardless of this meridian. "6 Song? Kou Zongqiu said: "All kinds of different opinions are speculations. Once upon a time, a pair of cliffs collapsed, and the heads and corners of the branches were all ready. I don't know if I will die. "7 Ming?" Compendium of Materia Medica: "To the east of the river, there are many keels in cliff points. Refers to take off, when assuming language; Cloud the dead, this book is true. The male keel is narrow and thick, and the female keel is wide and thin. All five colors are top grade, followed by white, medium and yellow. Black people are particularly low, so don't use them if they are detected. It's really sticky, crisp and ground into a fine square. "8 Qing?" Materia Medica from the New: "The white brocade on the keel is good, and the sticky color of the lick is good. People from Sichuan Valley and Bazhong, Liang Yi, Shaanxi Province, or people who use ancient mine ash to make fakes. 」
Quick identification? 1. keel: skeleton or broken into irregular blocks of different sizes. The surface is white, grayish white or light brown, mostly smooth, with some grains and cracks or brown stripes and spots. Hard, uneven cross-section, there are many honeycomb holes at the joint. Strong hygroscopicity, odorless and tasteless.
2. Five-flower keel: irregular block or cylindrical, with different sizes and lengths. The surface is grayish white, yellowish white or yellowish brown, with blue-gray and reddish-brown patterns of different depths and thicknesses, and occasionally with or without patterns. The surface is smooth with small cracks. It is hard, brittle and easily weathered, so it is often sealed with paper to prevent it from falling apart. Strong hygroscopicity, odorless and tasteless.