A pair of tanzanite earrings makes for an unforgettable gift. A rare and precious gem, tanzanite is sure to please. 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.