marcasite Definition

smoky quartz, chalcedony, malachite, peridot, labradorite, diopside, citrine, chrysocolla, tourmaline, spinel, semiprecious, epidote, cherty, pyrophyllite, adularia, pyrope, cabochons, albite, amphibole, aventurine, allanite, carnelian, hornblende, azurite, kyanite, electrum, alexandrite, muscovite, scheelite, stibnite, morganite, garnets, steatite, phlogopite, leucoxene, sericite, plagioclase, amethysts, hollowware, vermeil, lepidolite, aluminous, trioxide, dunite, tetrahedrite, iolite, feo, lapis, argentite, praseodymium, galena, uraninite, schistose, monazite, covellite, corundum, phosphorite, arsenopyrite, yttrium oxide, pyrargyrite, barytes, beryl, jadeite, octahedron, lithic, feldspars, pyrites, pyrochlore, cuprite, nephrite, greisen, alunite, ankerite, orpiment, eclogite, argentiferous, realgar, phyllite, aplite, biotite, kaolinite, schists, goethite, amphibolite, pietra dura, chalcocite, smithsonite, vein quartz, halite, cultured pearl, dichromate, fuchsite, topazes, argillite, alkalic, jasper, agates, aluminosilicate, eluvial, snuffbox,