The ruby, birthstone for July, is among the most highly prized of gemstones,  Ancient Orientals believed that the ruby was self-luminous. They called it "glowing stone" or "lamp stone."  The word ruby is derived from the Latin 'ruber', meaning red.  Rubies were thought to bring good health, as well as guard against wicked thoughts, amorous desires and disputes.  It was also believed that if a ruby turned darker in color it was a warning of coming misfortunes, illness or death.   The ruby is traditionally linked with protection, contentment, and harmony.  It is a symbol of passion, glory and brings freedom from care.