- Optical grade fluorides (High purity, low Fe content) * Magnesium fluoride (MgF2) * Barium fluoride (BaF2) * Calcium fluoride(CaF2) * Aluminum fluoride(AlF3) * Zinc Fluoride(ZnF2) * Strontium fluoride(SrF2) * Lithium fluoride(LiF) * Lanthanum Fluoride(LaF3)