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.
White Opal Brings Clarity and Serenity
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. (source) As a stone of protection, it absorbs gloomy energies and acts as a shield against the negativity of others. Additionally, it provides a kind of spiritual camouflage, allowing you to navigate difficult relationships and challenging situations without the energy of others getting stuck to you. 
White Opal for Mothers
White opals pulse with the energies of the divine feminine, making them the perfect gemstone for mothers. In particular, they provide emotional support for mothers preparing to give birth, alleviating fears and anxieties about the process of bringing forth new life. (source) They nurture a warm, supportive environment, providing just the support a mother needs to transmit these same qualities to her home environment. They also promote kindness, gentleness, love, compassion, and generosity, the very characteristics of motherhood. (source) Symbolic of everlasting love, optimism, harmony, and grace, white opals provide exceptional support for those raising tweens and teens. They also provide comfort for those experiencing an empty nest for the first time. (source) 
Attract the Angelic
Continuing with the theme of the divine feminine and nurturing support, white opal provides a direct connection to angelic beings. First of all, they provide a type of radiant light cleanse for your personal energy field, clearing out negative forces that inhibit your connection to Spirit. (source) By emanating the full spectrum of colors, they open your heart and mind to receive the exquisite vibrations of the celestial bodies, stimulating bursts of intuition, insight, and creativity. They ease intense emotions, promote joy and a zest for life, and connect you to the divine light of Spirit. (source) If you desire more of the sacred feminine in your life, I recommend purchasing a white opal jewel. In particular, wear them against your skin in a pendant or bracelet to provide the deepest connection to white opal's nurturing strengths. ~Angela Magnotti Andrews