beautiful ... window treatment ..... door or opening treatment... how about a room divider ... wall hanging... also I can see this in a patio type environment as long as if it becomes wet it would not loose shape
Use a sponge to soak up concrete mix in whatever shape you desire and let it harden into a hardened version of what you just cut out! Pavers or garden accents? (I would wear rubber gloves while dipping/soaking!) Worth a try.