I love these beads. And they were a hit at Bead and Button too. Lots of layers of colors with sparkling dichroic glass in the center. The bead is made on a large mandrel to get a nice big hole. Then the bead is electroformed. Copper is deposited on the glass. In this instance the hole is lined with copper and then the copper forms its own "bead caps".
I like to use them as pendants, but here is a finished bracelet I just made. Three strands of woven seed beads and the desert orb bead is used like a button for the closure.