The Sapphire is associated with the month of September in the Western tradition of birthstones, where it has often been linked to concepts of reflection and depth.
It is a variety of corundum and can appear in numerous natural colors, with the exception of red. Blue is the best-known shade, but it is not the only one found in nature.
Color differences depend on the chemical composition of the crystal. This variety makes the sapphire one of the most complex gems in the monthly calendar.
Jewel in photo: Multi Sapphire Necklace