Qing Hui Ni clay comes from the Fudong township of Yixing in Jiangsu province. This clay comes from an older mine that was mined out in the 1980's, clay is kept and sold by the township itself to raise funds.
This pot is made from burnt "Old Dragon Kiln" style fired Duan Ni clay. The process involves a firing time of three days and three nights, this is a special high-temperature process which creates a subtle raised clay effect and a high porous teapot which seasons well with use.
Golden Zhu Ni clay is from Wei Zhao Village in Yixing county. After firing at 1125C, the clay can contract as much as 25%, making the failure rate from firing quite high. The density of the finished product is quite high, but it's porous enough to allow for gradual seasoning.
Bao Lan Zhu Ni is a special type of Zhu Ni that is bluish in its natural state bu then turns a deep black when fired. Bao Lan Zhu Ni is from the western part of Yixing county near the Yellow Dragon mountain.