Identify true and false mother of Pearl

Pearl price mother, also known as pearl tree and Pearl mother, is the price layer of Pearl of bivalve, Bivalve and Hyriopsis cumingii All year round After picking, boil the shells with alkaline water, rinse them, scrape off the outer black skin, and then calcine them until they are crispy Its cool nature, salty taste, into the heart, liver two, with the liver, Yang, calm, hemostasis effect In the market, there are many kinds of clam shells pretending to be the mother of Pearl price Now, the differences between the mother of Pearl price and Tianjin clam are as follows: the mother of Pearl price 1 Martens pearl price shell: the shell is diagonally square in appearance, 5-9cm in length, the top of the shell is located in the front, the rear ear is large, the front ear is small; the back edge is straight, the belly edge is round; the edge scale layer is close, the end is slightly cocked; there is a obvious foot silk depression under the right front ear of the shell; the surface is light yellow, the concentric growth veins are very fine, in pieces, thin and brittle, easy to fall off, and often worn in the middle of the shell The Pearl in the shell has thick price layer, strong luster and light yellow edge The front part is short and low, the front and back edge is very short, with an inconspicuous crown process, the back edge inclines upward, and extends to become a large crown; the front edge is blunt and round, the belly edge is long, nearly linear, and the back edge is round, in a oblique cutting shape; the top of the shell is very shallow, the top of the shell is in front, with ears on both sides, the front ear is small, and the back ear is large 2 Hyriopsis cumingii: it is in the shape of four corners with different sides, flat and flat, short and small front back edge, and sharp corner; the back edge connected with the front edge protrudes upward to form a triangular sail like rear wing, which is fragile and thin and easy to break; the abdomen edge is connected with the rear edge, which is obtuse angle, slightly arc-shaped abdomen edge, blunt front edge, not obvious top nest, low top of the shell, not higher than the back edge, which is located in the front of the shell, about 1 / 5 of the shell length After processing, the above-mentioned products are irregular flakes with different sizes and thicknesses of about 5mm On one side, they are light pink with color luster, on the other side, they are milky white, smooth and glossy; on the surface, they are white powder; they are crisp and can be peeled off layer by layer; they smell tasteless and taste light The shell is 10 cm in length, 8.3 cm in height and 5.6 cm in width The top of the shell is located in the front, protruding forward and slightly bending inward, and the back and the ventral margin are connected into a complete arc The outer surface is smooth or with inconspicuous nodular nodules, with thick growth veins and 10 inconspicuous ribs on the back Although many fake mussels belong to the same family as the real pearl price mother, they are not included in the Pharmacopoeia, so they can not be used as medicine instead of Pearl price mother (Han Decheng)