If you played my Guess Who about this gray chesterfield sofa earlier this week, then you probably figured out that it's actually made of concrete! Now the seat has me seriously intrigued by all of the unusual things you can do with concrete. A material that's made from broken stone, sand, cement, and water and poured into molds of any shape and size, there's basically no limit to what you can build with concrete. It can even be colored or mixed with glass for a much prettier, less industrial effect. Check out these 10 ways you can decorate with concrete in your home.