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Rocks that glow under black light3/23/2023 You can grind it down to make fluoride for toothpaste. In the past, people called fluorite fluorspar, but today we reserve this word for industrially used stone.įluorite is useful in several forms. Lead ore (galena) can frequently be found nearby. They also find it as a vein deposit in limestone and it sometimes colors marble. Geologists often find it in granitic pegmatites. How Is Fluorite Formed?įluorite formed late in the geological processes which created igneous rocks, because of its low melting point. The large and varied crystals, range of colors, and fluorescence all make this mineral popular. Most fluorite will glow or fluoresce under black light. Fluorite comes in many crystal forms, including cubes, octahedrons, and more forms. It forms at shallower depths and cooler conditions than amethyst.įluorite is a common stone, but most commercial fluorite comes from China, Morocco, and Illinois. The word fluorescence comes from fluoride, not the other way around.Ĭalcium fluorite (CaF2) is one of the halide minerals. It got this name because it melts easily. The name comes from the Latin fluere, which means to flow. Purple fluorite can look a lot like amethyst, and we will help you determine which purple stone you have, lower in this article. Greens, blues, and browns are also common. Fluorite is a stone of many colors, one of which is purple.
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