For the Sonic Rush Adventure object, please see Iron Material.

Iron Materials are collectible objects that appear in the Nintendo 3DS version of Sonic Lost World. It is a type of Material from the Lost Hex which is used for construction.


Iron Materials are lumps in the form of several small black and gray pebbles. Despite the substance's apparent consistency, it is very versatile in building a number of devices.


In gameplay, the Black Materials are used in conjunction with other Materials to create RC Vehicles. The player can earn Black Materials by clearing Silent Forest's Zones. The Rank the player gets from clearing the Zones determines the amount of Black Material earned:

Rank Iron Materials earned
S 15
A 10
B 7
C 5
D 3

As an alternative to collecting Black Materials, the player can combine other Materials in Tails' Lab to create Black Materials. To create one Black Material, the player needs at least three White Materials.

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