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Fluorite

colors: many

Mohs hardness: 4 (defining mineral)

Comes from the latin word “fluere” which means to flow. (this is due to the fact that it melts very easily and is used in smelting) It was used by ancient Egyptians and is still used today for many things such as the production of hydrofluoric acid, microscope lenses, and helps make teflon coating.