Regolith is very common. It is found all over Xenos' surface, but do not disregard it as "space dirt". You can use it to recharge your batteries or refill oxygen through nifty chemical reactions. Surprisingly, it is used in one of the most important materials in the game, ceramic.
Note that the only differences between these variants are cosmetic, in game descriptions tell you why they are coloured differently.
- Regolith Red
- Regolith Yellow