French artist Delphine Roche de Montgrand created this inspired choker out of polymer clay. I love how something so simple can be so striking.
This looks like it would be a snap to copy, even for someone without much experience working with clay. You’d want to make sure it curved slightly to fit snugly against the throat, so you might need to lay it over an upturned bowl or something for baking. The ties appear to just be black ribbon.
Here’s a FAQ about working with polymer clay to get you started.