10.5cm Long Fluorite is composed of fluorine and calcium and is formed in hydrothermal veins in the Earth's crust. This mineral can be found in all colors of the rainbow with different hues. The different colors in Fluorite are caused by impurities within the mineral. The deeper colors are found in well-formed crystals. Fluorite was originally discovered in Illinois in 1842 but is no longer mined in the US. It can be found in China, South Africa, Mongolia, France, and Russia. ***Due to natural variations in stones, the appearance will vary***