>>>>tile.stone
This is basic stone.
>>>>item.swordDiamond
This is a diamond sword. 
Good at killing zombies and creepers.
>>>>item.pickaxeWood
Your very first pickaxe.
Not good at anything, beside getting splinters.
>>>>item.pickaxeDiamond
The ultimate pickaxe, made out of refined diamonds.
Shinnnnyyyy.
>>>>item.pickaxeIron
Sturdy, solid, efficient. Your best friend.