Iron furnace is the third type of furnace which may be crafted at level 27 
. It can be used to smelt 100 ores at a time.
 Ores and Bars 
| |
|---|---|
 Ores
|
 Stone • Copper Ore •  Iron Ore •  Silver Ore •  Gold Ore •  Promethium Ore •  Titanium Ore •  Ancient Ore •  Dragon Ore
|
 Bars
|
Bronze Bar •  Iron Bar •  Silver Bar •  Gold Bar •  Promethium Bar •  Titanium Bar •  Ancient Bar •  Dragon Bar
|
 Space
|
 Moonstone •  Shooting Star •  Meteor
|
Resources 
| |
|---|---|
| Mechanics |  Coins •  Energy •  Fight Points •  Heat •  Oil • Stardust
|
| Items |  Bones •  Feathers •  Food •  Leaves •  Logs •  Seeds
|
| Mining & Smelting | Bars •  Charcoal •  Gems •  Lava • Ores
|