biotite Definition

hornfels, gneiss, granodiorite, pleochroic, tonalite, sericite, hornblende, epidote, albite, chlorite, plagioclase, pyrrhotite, arsenopyrite, actinolite, amphibolite, syenite, pyroxene, amphibole, pyroxenite, phyllite, diorite, pegmatite, chalcopyrite, pyrite, monzonite, gabbro, andesite, phlogopite, norite, felsite, potassic, pentlandite, fuchsite, bornite, sphalerite, covellite, adularia, silicification, kaolinite, dunite, chalcocite, chrysocolla, schists, tetrahedrite, muscovite, ankerite, brecciation, galena, veinlets, illite, pyrophyllite, stockwork, alunite, molybdenite, sulphides, veinlet, vein quartz, carnotite, diopside, chalcedony, haematite, autunite, dacite, limonite, alkalic, enargite, cherty, blebs, stibnite, greywacke, siltstone, pyrope, pyrargyrite, allanite, diabase, uraninite, sulfides, greisen, stratiform, goethite, realgar, schistose, argentite, pitchblende, foliation, anomalism, feo, argillite, veining, argillaceous, halite, aplite, basalts, hypabyssal, scheelite, breccia, lapilli, feldspars, mylonite, siderite,