Although quartz can occur in a wide range of colors, blue colored quartz is surprisingly quite rare. The traces of dumortierite are responsible for its distinct color, which can range from light to dark blue.
Many use Blue Quartz to cleanse the aura and to clear away even the toughest energy blockages. By focusing in on the Third-Eye Chakra, Blue Quartz can help one to connect to higher realms and work with ascended beings, and brings great clarity to psychic visions and enhances dream work. Blue Quartz alleviates fear and enhances creativity and expression. It has the effect of balancing the throat chakra, it can assist in communication and allow its owner to reach out to others. It is an uplifting stone which can aid to lift depression and restore hope, happiness and peace.
Blue Quartz is used by metaphysical healers to treat the lungs, heart and spleen, as well as to heal the endocrine system. It is said to stabilize the metabolic process and to strengthen the immune system. It is believe to be especially useful for treating blood clots that are caught in the lungs. 
Blue Quartz brings a calm self-confidence, a sense of ease and soul-purpose deep within ourselves. It encourages us to be generous with our time and energy, with the people that matter most to us.
Wealth- In money matters, blue crystals can help you to find clarity and make decisions that come from clear-headed energy. These stones have a divine impact on leadership qualities as they help to elevate communication and understanding, all while encouraging creative thinking. 
The zodiac sign that is most in tune with Blue Quartz is Aquarius.
Blue Quartz is associated with the nurturing support of Cancer, the emotional drive of Scorpio, and the intuitive sensitivity of Pisces.