Zinni Question

[needaTEAcher]

I am learning from my teacher about there being three main layers of zinni in standard mines where Yixing clay is mined, with the top layer being the cheapest, and 2nd layer being significantly better, and then the deepest (under the zhuni, hongni, heini layers) being the best. I am only learning Korean names for things. Can anyone tell me the English versions of the Chinese names for these zinni varieties?

Thanks, as always!

[brandon]

http://teadrunk.org/topic/47/basic-yixing-clay-101/

http://teadrunk.org/topic/144/what-to-look-for-in-clay/

http://teadrunk.org/topic/121/yixing-cl ... red-disks/