Besides blue sapphire and ruby, the corundum family also includes “fancy sapphires.” They come in violet, green, yellow, orange, pink, purple, and intermediate hues. Shown here is the rarest of all, the Padparadscha. Some stones exhibit the phenomenon known as color change, most often going from blue in daylight or fluorescent lighting to purple under incandescent light. Sapphires can even be gray, brown, black, or white.