Alumentum (Thaumcraft 4)

Alumentum is an item added by Thaumcraft 4. It can be used as a fuel source in a Furnace—it will smelt 32 items (Coal smelts 8).

Right-clicking (or attempting to place) with Alumentum in the player's hand will launch the item. The item will cause a small explosion on impact with a block—not strong enough to break Stone, but strong enough to hurt a mob or player.