外表光滑,色外黑內黃,有光澤,坚硬明亮,嗅之有焦臭,嚐之味極苦。經驗鑑別法,取清水一杯,投入小粒熊胆於水面上,可見到它迅速旋轉,呈不停止的圓形,然后逐漸溶化。同时可在水面上撒下一些飞麈,見熊胆迅速旋轉,飞塵如悬綫的样子,沉到水底。云南产的色黄,質坚似琥泊。东北所产色多黑,質油润。如点水塗白紙上,其色淡黄。伪品:常以大魚胆或其他兽胆混充,外皮不光滑,內部干枯無光澤,嚐之味亦苦,但有夾杂 The appearance is smooth, the color is dark inside, yellow, shiny, hard and bright, the smell of a stench, taste very bitter. In the empirical method, a cup of clear water was taken, and the bear was put into the surface of the water. It can be seen that it rapidly rotates and is in a circular shape that does not stop, and then gradually dissolves. At the same time, some fly locusts can be sprinkled on the surface of the water. See the bear gallbladder rotating rapidly, and the flying dust is like a suspended line, sinking to the bottom of the water. The yellow color produced in Yunnan is as strong as sami. The color produced in the northeast is dark and oily. If the water is coated with white paper, its color is light yellow. Counterfeit goods: often mixed with big fish gall bladder or other animal gallbladder, the skin is not smooth, the interior is dry and dull, taste is also bitter, but there are impurities