牛宝和驴宝、狗宝一样，是身上生长的一种结石。是一种名贵紧缺中药材，是牛胆囊、胆管、肝管等脏器中的结石，外观呈青黑色，表面有少许光泽，药用功效类似牛黄，具有一定的药用价值，只是有关典籍对此均无明确记载。
牛宝”之所以被传天价，在于它被传的药用价值，以阴干为主，其块度越大，形成时间就越久，其价值也是越来越高。“动物肚子里的‘宝’，也就‘马宝’、猴枣、牛宝、狗宝作为中国传统中医药材在医书上有记载。
牛宝应当在阴凉通风的位置自然风干，不能在阳光下面暴晒，会影响其颜色，使其表面形成一层黑色的膜影响价值。牛宝在室温15-25度的情况下自然风干的时间是一个礼拜左右。天气较冷的情况下发现鸡宝建议用电风扇快速吹干，避免质变。具专业人士透漏牛宝具体的价格是根据牛宝的大小，外在形象，色泽确定的。此牛宝，风干完美，表面形成风干膜，保存良好，方便收藏，块度较大，具有极高的经济价值，药用价值。
英文翻译：The ox treasure and the donkey treasure, the dog treasure is a kind of stone that grows on the body. It is a rare and scarce Chinese herbal medicine, which is the stone in the gallbladder, bile duct, hepatic duct and other organs of cattle. It has a bluish black appearance and a little luster on the surface. Its medicinal effect is similar to that of bezoar, and it has certain medicinal value, but there is no clear record about it in relevant classics.
The reason why "ox treasure" is said to be high, is that it is said to be medicinal value, mainly to dry, the larger its block, the longer the formation of time, its value is also higher and higher. "The 'treasures' in the stomach of animals, namely' Ma Bao ', 'Monkey Jujube', 'Ox Bao' and 'Dog Bao', are recorded in medical books as traditional Chinese medicine materials.
Cow should be naturally air-dried in a cool and ventilated location, and not exposed to the sun, which will affect its color and form a layer of black film on its surface. The time of natural air drying is about a week at room temperature of 15-25 degrees. When the weather is cold, it is recommended to use an electric fan to dry the chicken quickly to avoid qualitative change. Have professional personage to reveal ox treasure specific price is the size according to ox treasure, external image, color and lustre is determined. This cow treasure, air-dried perfectly, the surface form air-dried film, well preserved, convenient collection, large lumpiness, has a high economic value, medicinal value.
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