Tokyo-born Mizuki Goltz founded her jewelry brand Mizuki in New York in 1996, crafting ethereal, fluid, modern pieces from robust, elegant materials. Her 14-karat-gold floating pearl earrings ($1,990) sway with the slightest breeze, while the crisscrossing diamond bands on her freshwater-pearl crossover ring allude to movement even while at rest ($2,490). (mizukijewelry.com)