There is the formation of a blue color bead. Borax on heating gets fused and loses water on crystallization. There is swelling of the chemical which results in the melting into a colorless liquid, which further forms a transparent glass bead consisting of Boric Anhydride and Sodium Metaborate. On further heating of the obtained chemical with Cobalt Oxide on a loop of platinum wire, we get a blue-colored bead.