The centerpiece for Full and Empty consists of a seashell hag stone (shells count too lol). It has several small legitimate holes.
Hag stones are stones that have a hole in them due to the transformative erosion power of water. Naturally, these stones have been adored by witches for protection and the gift of second sight.  
 
Full and Empty waist beads also have illuminating, circular sea shell shards and teal mirror beads. The beads are strung on wire and finished with a lobster claw clasp.