This part of the Peacefulpack adds two new ores to the world.
This first one is called Niter. It looks like this.
When you destroy it it will drop niter dust.
The second ore is called Sulphur . It looks like this.
When you destroy this it will drop sulphur dust.
With sulphur and niter dust you can craft gunpowder.
And sulphur dust can also be used as material for torches and as a fuel.
Niter dust alone can be used to duplicate your bonemeal.