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How to sign: solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Within this category: ader wax, amblygonite, amphibole, amphibole group, apatite, aragonite, argentite, argyrodite, arsenopyrite, asphalt, augite, baddeleyite, bastnasite, bauxite, beryl, borax, bornite, carnallite, carnotite, cassiterite, celestite, cerussite, chalcocite, chalcopyrite, chlorite, chromite, chrysoberyl, cinnabar, cobaltite, columbite-tantalite, cordierite, corundom, cristobalite, crocolite, cryolite, cuprite, dolomite, earth color, emery, erythrite, fergusonite, fluorite, gadolinite, galena, garnet, garnierite, germanite, gibbsite, glauconite, greenockite, gypsum, halite, hausmannite, heavy spar, hemimorphite, ilmenite, jadeite, kainite, kaolinite, kernite, kieserite, kyanite, langbeinite, lechartelierite, magnesite, malachite, maltha, manganite, meerschaum, mica, millerite, molybdenite, monazite, nepheline, nephelinite, niobite, nitrocalcite, olivenite, olivine, opal, ore, orpiment, osmiridium, pentlandite, periclase, pinite, pollucite, psilomelane, pyrite, pyrolusite, pyromorphite, pyrophyllite, pyroxene, pyrrhotite, quartz, realgar, red clay, rhodochrosite, rhodonite, rutile, samarskite, sapphirine, scheelite, smaltite, sodalite, spar, spinel, spodumene, stannite, stibnite, strontianite, sylvanite, sylvite, talc, tantalite, thorite, thortveitite, topaz, tourmaline, tridymite, turquoise, uraninite, vanadinite, vesuvianite, wolframite, wollastonite, wulfenite, xenotime, zeolite, zinc blende, zinkenite, zircon
