Judging from Baccarat's new, brilliantly geometric jewelry line, it's hip to be rectangular. The collection, which debuted in November, features oblong crystals in shades of cool green and blue set in sterling silver or warm pink and brown set in 18-karat gold. In the lineup: pendant necklaces, oversize cocktail rings and, with a nod to the economy, miniature cocktail rings ($460) that can be worn in twos.