Haliotis laevigata shell is oval, 11 to 14cm long, 8.5 to 11cm wide, and 3 to 6.5cm high. Brick-red surface is smooth, and with umbo that is above the surface, obvious growth line, spiral portion that is about 1 /3 of the shell surface, more than 30 warts, and 9 openings at the end. Main chemical constituents of abalone shells are calcium carbonate and organic matter and it still contains a small amount of magnesium, iron, silicate, phosphate, chloride and a trace amount of iodine. In terms of the calcined one, it contains calcium oxide and the organic matter is destroyed. In addition, it also contains zinc, manganese, chromium, strontium, copper and other trace elements. The inner shell has keratin with a pearl-like luster and it produces 16 kinds of amino acids after hydrolysis by hydrochloric acid.
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