September's birth stone is the sapphire, At one time any blue gem material was called sapphire. References to a blue-flecked stone led mineral experts to realize that some of what had been called "sappheiros" was actually lapis lazuli. "Sappheiros" is Greek for "blue." . The ancient Persians believed that the earth rested on a giant sapphire whose reflection gave the sky its color. It was also believed that sapphire would protect the wearer from envy and attract divine favor. The gem was regarded as a symbol of truth, sincerity and constancy.

Legend has it that if a poisonous snake were put into a vessel along with a sapphire, the rays from the gem would kill it. Our ancestors interpreted this to mean that sapphire was an antidote against poison.