Underground biomes are back with new materials for construction.
Underground Biomes Constructs 1.7.2 comes with new features for the current version of the game and now adds new materials that can create new decorative blocks designed to give greater flexibility to the construction in Minecraft. In addition, all the new blocks have different types, such as stairs, slabs or half blocks and now we can also create buttons with these new materials.

Detail and Download here : Underground Biomes Constructs Mod

Homepage: Mods for Minecraft