I had the pleasure to meet Argentinian jewelry designer Maria Rivolta at her namesake store at Mall of America today. She's engaging and chic---in a gray and black, Calvin Klein-inspired, understated way you might not expect from someone whose jewelry is known for color. But Rivolta loves a pop of color or shine. And she likes her jewelry to be fun, fashionable, and delightfully affordable. Meet her at the store (first level, outside Bloomingdale's) from 6 to 8 p.m. Thursday, and save on two of her favorite enamel designs.