Purion clay is a material created in Taiwan by skilled craftsmen. After the 1999 Jiji earthquake, potters in Nantou County, Taiwan accidentally discovered these deeply buried, unminable rock mines.

Nantou County rock mines are rich in minerals such as iron, sodium, quartz, and mica, which are baked at high temperatures many times with reduced oxidation. The minerals, which cannot be melted even at 1250 degrees, give the surface has a stone-like granular structure and the tea infused in this type of material is smooth and the flavor is extraordinarily sweet and smooth.