Fluorite
Fluorite is the natural crystalline form of calcium fluoride (CaF2). It is a transparent to translucent, glassy mineral. When pure, fluorite is colorless, but it usually contains impurities that color it. The most common colors are violet, blue, green, yellow, brown, pink, and blue-black; a single crystal may have bands of several colors. The name fluorite comes from the Latin "fluere" which means "to flow." Fluorite has been associated with February as a birthstone. It's useful for those born under the signs of Capricorn to overcome some of their practical nature, which could limit their spiritual growth; Aquarius, whose natural connection with the spiritual world can be enhanced by Fluorite; and Pisces, who will benefit from Fluorite's ability to strengthen the spirit and the will. Its numerological association is 7. It's related to water. Fluorite is useful in the treatment of the Third eye or Brow Chakra. It opens the chakras to increase awareness. It harmonizes and recharges all the chakras. It's a useful aid in sleep. Fluorite is a calming stone with powers to ease the mind and eliminate obsessions. Green Fluorite is especially well known for its ability to calm the mind and heart and Blue represents calmness and serenity; both stones can help those suffering from insomnia.