Abstract: A jewelry apparatus including a power module, a magnetically permeable band connected to the power module, the magnetically permeable band including a core and a primary winding disposed around the core, the primary winding electrically connected to the power module. A bead can have an aperture shaped to receive the magnetically permeable band, the bead including a secondary winding positioned around the magnetically permeable band when the magnetically permeable band is received through the aperture, and at least one light source electrically connected to the secondary winding. The core in the magnetically permeable band can include a flexible band of magnetically permeable cores, or the core can otherwise be flexible. The jewelry apparatus can include a wireless transceiver either on the power module or the bead such that the jewelry apparatus can be communicated wirelessly with other jewelry apparatuses.