Yixing Clays and Old Teapots

底槽清

the best clay you can get in modern times

GU Jingzhou 顾景舟双线竹鼓壶

Black Dotted Clay 原矿黑星土

Legendary, second only to TianQing Clay. No longer exists. For detail see

Black Dotted Clay Artificially Made with manganese 黑星土

On the internet when they say they are Black Dotted Clay , they really means they are Black Dotted Clay Artificially Made with manganese .

GuJingzhou顾景舟凤惠双圈壶


Republic Green 民国绿

This clay was created by adding Cobalt Minerals, not Chemicals as commonly used today