... is arenaceous clay. It's alternate name is YIXING ZISHA TEA POT. Our ceramic tea pots are ... mainly used in making tea.Its raw materials are the arenaceous clay in Dingshu ... color to emerge from Yixing kilns. Red clay and yellow clay are also used, independently or mixed, ... is a rare earth, from scientific research, purple clay does not contain lead, arsenic, cadmium, chromium, ...