I'm not usually one for pink but this plastic flower ring from Greece's La Touf (Kostas Latoufis) makes me smile. Also shown are his pinwheel-like titanium flower ring and actual pinwheel necklace. (Hint: when you go to his site, click on the "O," wait for "showroom" to appear, then click on that.)
For more pinwheels, check out Swedish-born, Philadelphia-based Tess Norberg of Nova Design.
Bonus link: apparently, when a European jeweller moves to the states, the first order of business is to make a pinwheel! Here's another from French-born, New York-based Virginie Millefiori.
Even more jewellery: