Yes. We sold a lot of these little beauties at the gem and mineral store I worked at. It keeps itself clear. Just wipe it off if necessary, with a clean cloth. It can help smooth your sleep if you leave it nearby or beneath pillow!
Btw: Selenite is very soft, so carry it alone in a pouch and avoid even scratching it with a fingernail. However, scratches only effect appearance, not its properties.