BattleTowers: What materials can the towers be made of?

[MicroGodrad]

I'm quite simply wondering what materials the towers can be generated as in the BattleTowers mod. Off the top of my head, I can think of Cobblestone, Stone, Mossy Cobblestone, Stone Brick, and Netherrack for when you are in the Nether.

[Joker2040]

Sandstone (Desert, link 10 minutes in, not English), Ice (snowy biome, pic link). (Biome isn't in the dictionary.)

Edit: I don't have a list. I just bumped into these.

[MicroGodrad]

Thanks.

[Bloodfrost]

the ones in the water are made from ice and clay i believe.