The crescent Moon and the Sun, seen by the ancients as the God and the Goddess, a symbol of the duality of deity, create a powerful image of the equal balance of male and female. And aren't they also a perfect metaphor for the "better or worse, richer or poorer, in sickness and in health" vows? A contemporary alternative to conventional engagement jewelry, the elegant Eclipse ring set is full of meanings and symbolism. The engagement Sun ring is made of sterling silver with 18K yellow gold…