LAS VEGAS — The 500,000-square-foot Crystals retail and entertainment district has opened at CityCenter, the second destination to open at MGM Mirage’s massive urban resort destination. Retailers include one of the largest Louis Vuitton stores in the world, as well as flagship locations for Tiffany & Co., Prada, Gucci, Roberto Cavalli and Ermenegildo Zegna. Other luxury retailers opening large-format stores include Bulgari, Cartier, Christian Dior, Fendi and Versace. Many of the tenants will be opening this month, with the balance opening in the first half of 2010. The Taubman Company was in charge of assembling the high-profile collection of luxury retailers and dining destinations, which includes Eva Longoria Parker’s Beso. Studio Daniel Libeskind designed the exterior architecture of the district, and David Rockwell and Rockwell Group handled the interior design.