Fluorite is a crystal that is incredibly deserving of being called The Most Colorful Mineral in the World. Fluorite truly can be any color in the rainbow, and a few more, so it would be difficult to get into the scientific explanation for every single color. The basic explanation for these differences in color are the presence and lack of impurities, exposure to radiation while growing, and the absence of voids in the color centers. When it comes to the highly desirable banding property of Fluorite, this is due to the fact that over the ages the conditions under which banded Fluorite specimens grew fluctuated heavily. This variation in growth becomes a beautiful crystal, whether its sharp bands of green, blue, and purple or even candy Fluorite’s lovely gradient of yellows, pinks, and more.