Every article that mentions holy stone says that holystone is not renewable, but you should be able to do the following:
- Place a holystone block. make sure you are doing this in the aether.
- Mine the block with a skyroot pickaxe so you get two.
- Repeat the process until you have the holystone you want. If your pickaxe runs out of durability, just make a new one.
If this doesn't work, explain why. 18.104.22.168 16:52, 1 February 2015 (UTC)