Fluorite forms in bands of colour, most commonly greens and purples but also in pink, yellow and blue. The rarest being the pink. It is also a stone that can change colour in different forms of light! 
Fluorite is a water soluble mineral with many benefits. It increases awareness, improves intuition and reduces stress. Different colors of fluorite have different effects on the body and psychic abilities. Other reported benefits are clarity of thought and improved concentration.