There are things in this world that have been known since antiquity, and we don't have the name of the first person to use iron, or to realize the bluish rock azurite, when roasted, yields copper. Calcium fluoride, the compound is pretty much the same as the mineral fluorite. And unless you find a reference book of minerals, the discoverer of that rock, and the fluorite mineral within it, and that the chemical formula is CaF is probably jut not very notable.