These are lampworked glass beads in iridescent metallic hues in two tones (the bead will appear to be that of two colors when checked out from diverse directions). Resin beads can be made using a silicone mold and epoxy resin. They may be designed to mimic other materials, which include https://beads-yellow-and-white19630.bleepblogs.com/31467101/yellow-beads-an-overview