Peridot

According to astrologers, the wearer of peridot will enjoy happiness in marriage, the power of eloquence in speech and enduring freedom from insecurity-both emotional and physical. Peridot was believed to have the power to dissolve enchantments. To exert its full potential, the stone was to be set in gold, then it would drive away night's terrors. If it was to be used to protect the wearer from evil spirits, it had to be pierced, strung on the hair of a donkey, and won on the left arm. As a medical remedy, it was powdered to cure asthma. Holding a peridot under the tongue was supposed to lessen the thirst of a person suffering from fever.