The ancient Persians believed that the earth rested on a giant sapphire whose reflection gave the sky its color. Damigeron, a historian of old, wrote that sapphire was worn by kings to protect them from harm. 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.