That is one massive, imposing piece. I envision an overall redesign of that necklace: removing the dangling bits and converting them to earrings, pendants and bracelets while leaving the collar section as the necklace. Or modifying the dangling section as another necklace convertible to a tiara. But that's just my taste.
A book should be either a bandit or a rebel or a man in the crowd..... D.H. Lawrence