Glass is glass, so any glass can be recycled in the curbside recycling bin, right? If you have a broken mirror, don't put in the recycling bin. Mirrors aren't technically 100 percent glass -- they are actually two materials sandwiched together (glass on front and a chemically treated coating on the back, which gives it the mirror effect). To make it recyclable, the backing has to be removed from the glass. Since this is quite difficult, it's best not to put any mirrored items into the recycling bin, since it can contaminate a load of recyclables. Instead, broken mirrors should be disposed of properly, and used mirrors (in good shape) can be donated to charity.