Natural Cymatium Rubeculum shell from the South Pacific, ethically sourced, embellished with a 6x4 pear-shaped deep green topaz faceted gem hand set in a 14k gold  bezel.
Shell: 1.1inch
 
Grommet-14k gold 
7.5mm ring 
Chain options: 16-inch 1.5mm gold filled cable chain
Black leather choker with 14k gold ends