Found under the surface, iron is your old friend. Strong and versatile; It is well suited for the manufacture of stronger, longer lasting, more advanced components.
If damaged, it can also be used for basic emergency repairs; And it also has its uses in crafting consumables... You can truly never have too many tiny iron nuggets. Never.
Repair 2500 of your HP per 1 Item
Can be found at:Edit
1. Terrestrial Planet : 50-110 depth
2. Aerial Planet: 70-110 altitude