Red Rocks in Cutter's Cry?

[Enur]

Could be the same stuff as the lamp posts inside the Dravanian forelands mountain ( forgot the name) is made of.

Im thinking naturally, pure fire crystals. We are going quite deep so perhaps crystals get purer the closer we get to the core of the planet

[Anonymoose]

Im thinking naturally, pure fire crystals.

I was thinking healthy fire crystals, as well. A lot of northern Thanalan is corrupted (aka over-aspected) crystal ("Dalamud's Talons"), but this is less orange by far. This could have just been a deeper, more sheltered area. The only crystal-like texture that's like it is the wonky dark matter formation out in Boulder Downs, but that seems unlikely in a cave.