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The good mud minerals are natural purple mud and green mud symbiotic minerals, but the purple mud is more, the color is reddish, the green color is green, the gray is gray, the green mud is high, the yellow color is burnt, and the temperature is high<a href="http://www.chinaclayteapot.com">Yixing Purple Clay Teapot Set</a>. It is grayish. The characteristics of the granular structure are that the "bone and flesh" is strong and the surface texture is very rich.
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