Ruby signifies passion and unbridled, unrestrained love, making a pair of ruby earrings a perfect Valentine's day gift. Garnet has been known as a gift of love since the time of the ancient Greeks. A pair of garnet earrings are an excellent gift for an anniversary or January birthday. A pair of peridot earrings sparkle by day, and remain brilliant at night. The Romans called peridot the “evening emerald†whose vibrant green color remained visible by lamplight.