Ravishing 18k white gold ring with a large celestial 2.3 ct Australian boulder opal flanked with diamonds and inlaid onyx. Throughout most of history, the opal has been regarded as the luckiest and most magical of all the gems because it embodies all of the colors in the visible spectrum. In ancient Rome, the gem symbolized love and hope. Arabic legends say it falls from the heavens in flashes of lightning. The ancient Greeks believed opals were the tears of Zeus and would impart them with the gift of prophecy and protect them from disease. And in Europe, the monarchs wore opals in crowns and necklaces as symbols of hope, purity, and truth.