Rhinestones are the embellishment du jour. Not only do faceted crystals adorn expected cocktail looks; they bring their glimmering light to casual pieces too. There are diamante-embellished sweatshirts worn over fringy skirts and a spectacular allover crystal-fringed tee for modern-day flappers. More subtle uses of the gems show up as pocket trims (along with vinyl strips) or outlining the neckline of a sweater. Even activewear gets the glam treatment with a nylon jacket that sports a gem-studded neckband that secures with velcro.