White Simulated Opal Crystal Heart Dangle Earrings White Opal is the astrological gemstone for the Zodiac sign Libra. Until 1912, it also served as the official birthstone for those born in October. It has long been associated with purity, love, goodness, and nurturing. Above all else, white opal provides a sense of calm, particularly for the mind. It soothes restless, racing thoughts and promotes living in the moment rather than focusing on the past or the future. White opals pulse with the energies of the divine feminine, making them the perfect gemstone for mothers. View Photos For Further Details.