What with the ceiling-high glass artwork and the soft track lighting, Pomellato could easily double as a posh cocktail lounge for martini-swilling clubgoers. But in reality, this Madison Avenue jeweler simply wants to dress the selfsame up. The store's collection, which walks a fine line between gaudy and elegant, repeatedly finds items like the boldly colored Pinup cocktail ring or the heavy-link bracelets falling just on the right side of the garish-gorgeous border. Sporting just one bobble from among these sparklers can go a long way toward accessorizing any ensemble: The semiprecious-stone earrings may be your best surefire attention-getters.