After closing their landmark Fifth Avenue mansion for a two-year renovation last week, the luxury jeweler Cartier -- of Love bracelet fame -- has opened a new two-story boutique located on 5th Avenue and 59th Street, just seven blocks up from the mansion. It's super fancy (of course) and HUGE. Measuring 11,000 square feet with 8,000 square feet designated for selling space, it is the largest worldwide. Designed by Paris-based architect Bruno Moinard, the boutique has special selling 'salons' for watches, diamonds and accessories. Luxury shopping at it's finest. So see you at the Diamond Salon this weekend?