Rainbow Moonstone Blue Topaz Silver Ring, Enceladus Aurora is named after Enceladus one of Saturn's moons. An ice-covered orb, it is mysterious and beautiful. This 10 carat moonstone resembles the crosshatched surface of ice. Flanked by two blue topaz, weighing appx one carat each, they look like auroras on the moon's poles. The setting is made of sterling silver, very angular and space age. Triangles of silver wrap the stone and sleek double prongs hold the stone securely in place. Design by Frank Reubel.