Nipple Halos - Gem Slider - Black Silicone Band - Black Beads. Every girl likes a little bling now and then. These black silicone Nipple Halos from Bijoux de Nip feature black gem-encrusted sliders and dazzling black and clear crystal beads. Nipple Halos are jewelry for your nipples! Slip the silicone band around your nipple and then slide the gem slider bead up to tighten. So simple, so easy, so pretty.