September’s birthstone Sapphire is said to be the "gems of all gems". Associated for centuries with royalty, sapphires symbolise nobility, loyalty and happiness in love. Almost as strong as diamonds, sapphires exist in a stunning array of colours and those that are not blue are known as "fancy sapphires". They come in violet, green, yellow, orange, pink, purple, and intermediate hues. 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, black, or brown.