1. Find a dungeon and have a suitable pickaxe ( wood or better) and mine it.
2. Go into creative mode and place it in your hot bar.
3. Have an inventory editting program and place it in your inventory.
4. In a server put in the give command and put in the value.
(dec ~ 48) (hex ~ 30)
It looks like normal Cobblestone, only with moss growing in it. It has no crafting uses, it's main uses are for decorations and building purposes.