Lapis Lazuli Blocks, which are vanilla blocks, can be crafted from Lapis Lazuli Dye. It is a light blue color, with darker blue markings on it. It currently has limited use in Tekkit. These include as a building block, as storage, decoration, a LapPack or Lapis Lazuli (Dye). As shown inside the recipe below, nine lapis lazuli make one block. This can prove to be a very helpful tool when mining for long periods of time. You gain the ability to store more raw lapis lazuli in a more compact block form. This takes up less space inside your inventory and gives you more room for diamonds, iron, gold, etc.