rose gold alexandrite and moonstone ring. Size 5 1/4 Brand new, mint condition. Alexandrite is the color-change variety of the mineral chrysoberyl. Green by Day. Red by Night. Alexandrite is bluish green in daylight or fluorescent light and purplish red in incandescent light or candlelight. Moonstone is a birthstone for the month of June. In addition to moonstone, pearl and alexandrite are also traditionally considered June birthstones. Moonstone is known for its shimmery appearance and association with the moon's phases. This ring would be the ultimate gift for your small fingered June born. It is a delicate rose gold ring and a changing color stone that are really hard to photograph.