Christina Ricci doesn’t always get it right. But this week, she followed an appearance in dazzling diamond chandeliers from Bulgari with the week’s best jewelry.  The petite star wore an ice-blue form-fitting satin dress to the launch of the Prada book party. Instead of echoing the pale tone of the dress in her jewelry, she added a dramatic dimensional brooch set with gold gems and loops of diamonds against black. And then she added beautiful classic deep blue sapphire and diamond drop earrings.  The ensemble wouldn’t have been out of place on Mad Men but for the unconventional palette and scale of the brooch.  Classic jewels yes, but somehow modern too.