I like this Mod! Lots of interesting stone to find and use!
However, there is no way to turn some of your cobbled stone back into non-cobbled stone. Of the stone I have mined, the following can't be reverted:
1. Cobbled Howlite can't be made into Howlite.
2. Cobbled Shale can't be made into Shale.
3. Cobbled Beige Tuff can't be made into Beige Tuff.
4. Cobbled Grey Tuff can't be made into Grey Tuff.
5. Cobbled Red Tuff can't be made into Red Tuff.
There may be more that I haven't found yet. I want to use the non-cobbled versions & I don't want to have to go into Creative Mode to do it.