Gray concrete block is one of the blocks in the game, they can be used for decoration.To make a Gray Concrete, you will need Sand Blocks, Gravel, Skeleton Bone, Squid For Inc Sac, Bone Meal, Gray Dye and Gray Concrete Powder. Please follow the following steps to make Gray Concrete.
The next required item will be gravel. Find at least four of them.
In order to make gray concrete you will have to find and kill Skeletons to get the bones. Skeleton will randomly drop bone, pick that up.
Squid For Inc Sac
After that you will have to find and kill squid in order to get ink sac. You will find them under the water.
Gray Concrete Powder
Now you can craft Gray concrete powder with the help of gray dye, sand blocks and gravel blocks in inventory. Add these things into 3*3 crafting grid on the crafting table. This will provide you with gray concrete powder, and must take it into your inventory.
Go to the water stream and add gray concrete powder in the water. After placing it into water you can obtain gray concrete by using pickaxe.