Blue concrete is one of the craft able blocks that can be used for decoration.
To Make Blue Concrete, you will need Sand Blocks, Gravel, Lapis Lazuli and Blue Concrete Powder. Please follow the following steps to make Blue Concrete.
The next required item that you will need to find and get is gravel block. Take at least four of them using your iron shovel.
After that you will have to find lapis lazuli gemstone. You need to find and get at least one lapis lazuli stone. Use your iron pickaxe to obtain it.
Blue Concrete Powder
Now you will be able to craft Blue concrete powder because you have lapis lazuli, sand blocks and gravel blocks in inventory. Head towards the crafting table and add these things into 3*3 crafting grid of the crafting table in the same way as shown in the image below. Add 4 gravel blocks at the four corner cells, lapis lazuli in the center cell and 4 sand blocks in the remaining 4 cells of the crafting grid. You will get Blue concrete powder in the right-side box of the crafting table. Add this item into your “ready to use” stock.
Now you can make a blue concrete block by placing blue concrete powder in the water. After placing powder into water, you can obtain it by using any pickaxe.