Maud La Roux answered The birthstone of Libra is the Opal.The alternative birthstones of Libra are: Peridot, Agate Aquamarine, Tourmaline and Sapphire.October 12 birthstone, Libra Dates: September 24 - October 23The western Zodiac - Libra is the seventh sign of the zodiac, and is known as "The Sign of the Scales".Ruling planet: Venus.Ruling element: Air. Libra Character traits Positive: RefinedCharmingPerceptiveDiplomaticPleasant Negative:Flirtatious IndecisiveInsecureDeceitfulFrivolous Properties of the Opal birthstone The opal- the birthstone of Libra - has many different properties...HopeInnocencePurityHappinessFaithfulnessLoyaltyConfidence