... silky fabric to protect being damaged. Characteristic:Purple clay, which has high iron content, gives its name ... only color to emerge from Yixing kilns. Red clay and yellow clay are also used, independently or mixed, and ... ) is a rare earth, from scientific research, purple clay does not contain lead, arsenic, cadmium, chromium, and ... aches and pains etc. Yixing hand-make mini Purple Clay Teapot(JY020)