... birthday craft Purple clay teapot maintain healthy condition keep the tea in fresh taste artisitic,natural,high quality birthday craft1.Purple clay ... it with artistic culture3.The purple clay is a rare earth, from scientific research, purple clay does not contain lead, arsenic ... harm to human healthy, whereas the research proves that purple clay contains SiO2, Al2O3, Fe2O3, MgO, CaO, these minerals ...