MINERAL SURVEY FOR PIEZO-ELECTRIC MATERIALS 



149 



Labradorite 



Langbanite 



Langbeinite 



Langite 



Lanthanite 



Lapis-lazuli 



Laumontite 



Laurionite 



Laurite 



Lautarite 



Lavenite 



Lawsonite 



Lazulite 



Lazurite 



Leadhillite 



Lehnerite 



Lehrbachite 



Leonite 



Lepidolite 



Lepidomelane 



Leucite 



Leucophanite 



Leucophoenicite 



Libethenite 



Limonite 



Linarite 



Linnaeite 



Licroconite 



Liskeardite 



Lithiophilite 



Loeweite 



Loellingite 



Loparite 



Lorandite 



Loranskite 



Ludlamite 



Ludwigite 



Magnesite 



Magnetite 



Magnetoplumbite 



Malachite 



Malacon 



Mallardite 



Manganhedenbergite 



Manganite 



Manganophyllite 



Manganosite 



Manganotantalite 



Marcasite 



Margarite 



Margarosanite 



Margasite 



Marialite 



Marignacite 



Marmolite 



Marshite 



Martite 



Mascagnite 



Matlockite 



Maucherite 



Meionite 



