Rockwool (Thermal Expansion 3)

Rockwool is a type of decoration block from the Thermal Expansion mod. It is easy to manufacture, and it can easily be colored. Rockwool is fire resistant.

Recipe
Light Gray Rockwool is crafted by smelting Slag in a furnace.

The color of the Rockwool can be changed by surrounding a dye with it in a crafting table.