Couturiers depend on handwork to set them apart, and a new crop of limited-edition fragrances is embracing that mentality. Love, Ralph Lauren Luxury Edition Parfum ($2,200) includes a hand-cut amethyst. Gianni Versace Couture Eau de Parfum ($2,100) comes in a custom train case. And Kilian's Artistic Edition fragrance bottles ($1,500) were hand-painted by Sophie Matisse, the grandchild of art royalty.