Here are two ideas from Austrian goldsmith Sylvia Goldberger that I find intriguing. The Mobile ring below is made up of rearrangeable elements that are secured to a core ring.
The Ring/Necklace is just what it says. A ring and a necklace that join together to create a necklace that can be changed and rearranged on a whim. Increases the wear-ability, interest, selling power.
