electrum Definition

argentite, malachite, cuprite, chrysocolla, azurite, tetrahedrite, chalcocite, pyrargyrite, stibnite, bornite, covellite, galena, chalcedony, muscovite, epidote, diopside, sericite, pentlandite, arsenopyrite, enargite, amphibole, alunite, phyllite, argillite, eclogite, hornblende, albite, kyanite, pyrophyllite, pyrope, kaolinite, sphalerite, dunite, dolomites, argentiferous, allanite, schists, biotite, pyrochlore, autunite, actinolite, vein quartz, blebs, adularia, pyrrhotite, phlogopite, amphibolite, halite, illite, scheelite, siderite, ankerite, molybdenite, eluvial, chalcopyrite, haematite, goethite, pyrites, uraninite, diabase, realgar, beryl, pitchblende, detrital, cinnabar, wolframite, alkalic, cherty, limonite, aplite, chlorite, lepidolite, carnotite, marcasite, veinlets, supergene, fuchsite, smoky quartz, bastnasite, pyroxenite, stratiform, greisen, greywacke, lamprophyre, anorthosite, plagioclase, norite, pyroxene, orpiment, hornfels, argillaceous, arenite, sulfides, gossan, dacite, schistose, corundum, anastomosing, metamorphic rock, sulphides,