Basalt (RedPower 2)

Basalt is a block added by Redpower 2. It generates in the world in the form of Volcanoes. Similar to Stone, when it is mined it will turn into Basalt Cobblestone, unless a pickaxe with the Silk Touch enchantment is used. Smelting Basalt Cobblestone in a Furnace will turn it back into Basalt.