You must have BRICKS and ROCK to make GREY BLOCK. GREY BLOCK belongs to color blocks category. In a hurry? GREY BLOCK is just right for you. Oops, there is no entry in the database about durability. If you know something, please share. Oops, there is no entry in the database about seedratio. If you know something, please share. Oops, there is no entry in the database about gemratio. If you know something, please share. There is no data about blockratio.