Amazing Aurora Borealis effects from this Swarovski Crystal. It will certainly get noticed. Only three available at this time. In Greco-Roman mythology, Aurora is the personification of the dawn, and the sister of the sun and the moon. The ancient Greeks and Romans believed that every day Aurora raced across the sky in her chariot, alerting her brother and sister to the breaking of the new day. Another new day full of mysteries dawns. This oval shaped stone is 8mmx10mm in an adjustable metal alloy setting. The ring size starts at UK O US 7.5 as it is adjustable it can be made smaller or larger to fit.