Crushed Obsidian

Crushed Obsidian
Mod	Railcraft
Type	Solid block
Tooltip text	Prevents Mob Spawns
Required modules	Factory

The Crushed Obsidian is a block added by Railcraft. This block is used to create Obsidian Dust. When placed in the world, it will not allow any entities to spawn on top of it, regardless of light level.

Recipe

16
16

8
8

8
8

4
4

Rock Crusher