Good luck getting it clean. 
I'm sure you already know this, but do be aware that that whatever you do, they are very very brittle. When I used to smoke, I resorted to smoking a short stemmed clay pipe at living history events, and you only have to put it down a little too firmly for a chunk to break off.
I'm sure you already know this, but do be aware that that whatever you do, they are very very brittle. When I used to smoke, I resorted to smoking a short stemmed clay pipe at living history events, and you only have to put it down a little too firmly for a chunk to break off.