chert Definition

quartz, radiolarian, spilite, quartzite, metamorphic rock, lithic, argillite, siltstone, igneous rock, greywacke, chalcedony, diabase, hornblende, mudstone, feldspar, volcanic rock, sandstone, gneiss, phyllite, amphibolite, sedimentary rock, diorite, calcite, gabbro, clastic, biotite, epidote, pegmatite, argillaceous, siderite, rhyolite, syenite, galena, schists, electrum, chrysocolla, azurite, haematite, hematite, limestones, arrowheads, muscovite, covellite, jasper, basalt, greisen, claystone, obsidian, greenstone, stibnite, hornfels, pyroxenite, outcrop, stratiform, dolerite, adze, uraninite, gossan, chalcocite, agates, dolomites, adularia, garnets, schistose, granites, arsenopyrite, bornite, eclogite, alkalic, molybdenite, eluvial, olivine, malachite, halite, alunite, dunite, sericite, sphalerite, pyrrhotite, potsherds, allanite, anorthosite, ironstone, gravels, scheelite, loess, stromatolite, coprolite, phlogopite, realgar, kaolinite, limonite, beryl, pyrophyllite, phyllosilicate, amphibole, chalcopyrite, tetrahedrite, pitchblende, barite,