Stone red mud is usually produced in the lower part of tender mud layer in Yixing, Zhejiang Province. On the whole, the stone red mud has a retro purple color, and the mud is delicate. According to ancient literature, the stone red mud is "the stone bone that has not been touched by the wind, and the pottery turns into vermilion color". According to ancient documents, after being mined and fired, the stone red mud will show the color of vermilion or vermilion purple or even vermilion yellow, which looks bright but not evil.
The stone red mud teapot has a unique taste of making tea because of its high density. Therefore, using a stone red mud teapot to make tea, the fragrance of tea generally comes out faster, and the fragrance can always spread to far away places. In addition, the rich iron ions in the stone red mud teapot can be continuously emitted under the stimulation of tea, thus improving the taste of tea to a certain extent, which is beneficial to human health.