The Alexandrite North Star Signet Ring represents the brightest star in Ursa Minor. A guiding star; a star that is used as a reference point in navigation. Let this ring represent your personal North Star, your guiding light: the values, priorities, or people that keep you pointed towards true north. Alexandrite is the birthstone of June, it is a rare color-change stone, showing different colors in natural light versus incandescent light. Alexandrite is believed to be an omen of good luck and prosperity.