commercial | 横把壶 (Heng Ba Teapot, China, 200ml, purple clay & ebony wood). Yixing ZiSha Clay Teapots were originally unique Chinese handmade clay crafts, but now also are machine made in batch production. Raw materials for this purple clay origin in Jiangsu, Yixing (thus aka as Yixing Zisha teapots). The classification of Zisha clay teapots can be made of purple (紫泥), green or red clay. Zisha clay's main mineral components are water, mica, kaolin, quartz, and iron.