Nature's rainbow is reflected in Tourmaline, a gem specie with an unlimited range of colors. Tourmaline's spectrum also includes dual hues in a crystal or cut stone called bi-colored gems. Tourmaline meaning "mixed color stones", was derived from a Singhalese word "turmali". First identified in the eighteenth century, lore says that Tourmaline aids against misfortune and protects travelers against falls. Tourmaline is the anniversary stone for the eighth wedding celebration. Any of Tourmaline's many colors are an appropriate alternative for October birthdays.