I woke up Thursday with this idea floating around in my grey matter... or something similar anyway.
To create a hard copy of my idea, I opened the scan of the Paua shell cabochon in Paint Shop Pro & added the main body of the choker in black. The second cabochon will be a turquoise stone, added because of the way the turquoise in the bezel stands out.
There might be many changes made to this design or I could even go in an entirely different direction. I am not a slave to my design layouts!