From the Crystalvaults.com site:

Labradorite Uses and Purposes - Overview

Wearing or carrying Labradorite allows one's innate magical powers to surface. It enhances the mental and intuitive abilities of clairvoyance, telepathy, prophecy and coincidence control, and assists in communication with higher guides and spirits in accessing Akashic records, psychic readings and past-life recall. It provides an ease in moving between the worlds, and permits a safe and grounded return to the present. [Simmons, 225]

As a workplace stone, Labradorite brings out the best in people, making work life more congenial. It encourages courtesy and full attention to the customer, and assists part-time and temporary staff in becoming fully involved in a company. [Eason, 163]

Labradorite tempers the negative side of our personality, the traits and actions that rob our energy and may produce depression or shame. It assists in reducing anti-social, reckless or impulsive behavior in children, teenagers and adults who are easily led into trouble by others, and may aid in detoxifying the effects of tobacco, alcohol, and to a lesser degree, hard drugs. [Megemont, 109][Eason, 163]

Labradorite helps develop the hands' sensitivity, making it useful for physiotherapists and all who use the power of touch to heal. [Megemont, 109]

Labradorite Physical Healing Energy

Labradorite is beneficial to the lungs, and may assist with respiratory problems, bronchitis and colds. It assists in digestion, regulation, and metabolism. [Eason, 163][Melody, 368]

It has been used in treatment for the eyes and brain disorders, to stimulate mental acuity, and to reduce stress and anxiety. It may also be soothing during menstruation, for PMS symptoms, and for pain relief. [Eason, 163][Melody, 368][Hall, 170]

Labradorite lowers blood pressure, reduces sensitivity to cold, and alleviates rheumatism and gout. [Eason, 163][Hall, 170][Gienger, 54]

Emotional Healing Energy

Labradorite calms an overactive mind and energizes the imagination, bringing in new ideas. [Hall, 170] It is a wonderful tool for returning joy and spontaneity back to one's life. It helps eliminate the emotional drain of daily routine or being weighed down by responsibility, and awakens a sense of adventure and change. [Eason, 163]

As the matriarch of the subconscious mind, Labradorite brings forgotten memories to light and facilitates their understanding. It encourages contemplation and introspection, bringing the clarity of intellectual thought and intuitive wisdom to help dispel illusion, determine the root cause of an issue, and bring one to peace. It is an uplifting crystal, helping to banish fears and insecurities while enhancing faith and reliance in oneself and trust in the universe. [Melody, 367][Hall, 170][Gienger, 54]

 Chakra Healing and Balancing Energy

Labradorite radiates a predominant blue crystal energy that stimulates the Throat Chakra, the voice of the body. It is, in essence, a pressure valve that allows the energy from the other chakras to be expressed. If it is blocked, or out of balance, it can affect the health of the other chakras. When the throat chakra is in balance and open, it allows for the expression of what we think and what we feel. We can communicate our ideas, beliefs, and emotions, bringing our personal truth out into the world. We have an easy flow of energy within the body and spirit. The energy that springs upward from the lower chakras can continue its path enabling free expression and natural release. Darker shades of blue encourage the power of truth, while lighter shades carry the power of flexibility, relaxation, and balance. Labradorite, with its iridescent flashes of color, can be very beneficial in uniting all of the chakras.

Golden Labradorite assists in opening the lower chakras during ritual or magical practices, while Spectrolite works with one's "Rainbow Body" to enhance awareness of the higher realms. [Simmons, 226]

Spiritual Energy

Labradorite's energy allows one to penetrate the veils of the Void, where all knowledge and possibility are held. It is the place of potential and the source of creation, and for shamans, magicians, and Light workers, Labradorite acts as a protective ally in recalling experiences from other realms, other times and other lives. It assists in moving between the worlds, and in bringing to this realm the creations which are for the highest good of all beings. [Ahsian, 226]

Labradorite is a powerful protector of the aura, preventing energy leakage, and others from tapping into and draining your personal energy. It ensures all elemental forces are empowered and proportional within one's system. [Ahsian, 226] It is also a useful tool in radionic analysis and treatment to help pinpoint problem areas. [Melody, 368][Hall, 170]

Referred to as the "temple of the stars," Labradorite is thought to bring the light of other planetary beings to the soul of the user. Its labradorescence is believed to be of extra-terrestrial origins, and enclosed in the mineral to bring the evolved energies from other worlds to the Earth plane. [Melody, 367]

 Color Energy

Labradorite shimmers in blues, the colors of ice and the slowly lightening winter sky as the deep violets depart and the sun climbs higher each day. As winter gives way to spring, and new life is ready to burst forth, blue marks the beginning of life and emotion. Blue crystals bring trust, faith, patience, and respect, lending the focus we need to become more sincere, act more responsibly, and become more trustworthy.

Light blue crystals help us accept the life we have, develop patience, reconcile differences, or seek forgiveness. They're excellent for recovery efforts from addictions or destructive patterns, aid in curbing tempers, and help us become more dependable and cheerful. Light blue crystals also assist in dealing with grief, letting go of the past, and curing guilt. Darker blue talismans enhance the respect and compassion we have within ourselves. They teach us humanity, discretion, and honor, and encourage us to act more charitably and focus our efforts on service to others.

Meditation with Labradorite

Meditating with Labradorite allows one to recognize humanity as "being of light," transcending limitations of the past and thoughts of the future, and embracing the infinite possibilities of the moment. It allows one to "be" and rest assured the light is always there, surrounding and pure. [Melody, 368]

Meditate with Golden Labradorite to open channels to the higher realms of archangels. Spiral through and above your hair to mend tears in your aura. [Eason, 102]

Meditating with Spectrolite raises consciousness and facilitates multi- and inter-dimensional journeying. Holding profound esoteric wisdom, it takes you into other lives and prepares the body and soul for ascension. [Hall II, 326]

Labradorite Divination

The Divinatory meaning of Labradorite: You may have to temporarily make the best of a less-than-ideal situation, but soon will be able to do things your way. [Eason, 163]

Labradorite Natural Birthstone.

Labradorite which is blue in color is one of the natural birthstones of those born as the world awaits the vernal equinox and spring (February 19 - March 19). This is a time when new life is about to burst forth, a time of faith and trust. Blue crystals bring you patience and respect.

 Stone of Aurora Borealis

Labradorite is not associated with any zodiac sign, though Cancer is drawn to its many colors and the stimulation of its electromagnetic energy on the brain's thinking. [Megemont, 109]. Legends tell us it is the stone of the Northern Lights, and it seems to be just that as is shimmers eternally.

Labradorite Amulets and Talismans

As an amulet of protection, Labradorite is a powerful Barrier Filter. Barrier crystals have incredible abilities to help us focus and amplify our efforts to keep undesirable elements out of our lives. Its crystalline structure gives it strength in all directions, allowing it to provide barriers to attack from all directions simultaneously.

Crystals with the earth power of a Filter, absorb positive energy flow but work to keep negative energy away from us. They help us view the world in a "glass half full" outlook, to see the best in others, the beauty in life, and the good in humanity. They keep us focused on the positive in situations and to not be overwhelmed by the negative. In our technological world, Filters also work to keep harmful electromagnetic transmissions from sapping our energy and health.

Labradorite Feng Shui

Labradorite utilizes Water energy, the energy of stillness, quiet strength, and purification. It embodies potentialities unrealized. It is yielding, formless, yet powerful. The Water element brings power of regeneration and rebirth. It is the energy of the circle of life. Use blue crystals to enhance any space that you use for repose, calm reflection, or prayer. Water energy is traditionally associated with the North area of a home or room. It is associated with the Career and Life Path area, its flowing energy assuring a balance of energy as your life unfolds and flows.

Labradorite in Ancient Lore and Legend

In ancient lore, Labradorite was considered to be a talismanic gem of winter, and in Oriental culture was known as a "phenomenal gem" to be worn on Saturdays. Phenomenal gems exhibited a moving line, star, or changes on the surface as the light varied, and was considered to bring good fortune to the wearer. [Kunz, 326, 333-334]

Native Inuit tribes of North America claim the first Labradorite fell from the Aurora Borealis from the fire of their ancestors. Another legend describes a brave Inuit warrior who struck Labradorite with his spear and created the Northern Lights. [Eason, 163]