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["mineral","formula","density (g/cm3)"]
["quartz","SiO2",2.65]
["Na-plagioclase feldspar","NaAlSi3O8",2.62]
["Ca-plagioclase feldspar","CaAl2Si2O8",2.76]
["alkali feldspar","(K,Na)AlSi3O8","2.55 - 2.63"]
["biotite","K2(Mg,Al)6Si6Al2O20(OH)4","2.7 - 3.3"]
["muscovite","K2Al4[Si6Al2O20](OH,F)4","2.77 - 2.88"]
["olivine","(Mg,Fe)2SiO4","3.222 - 4.392"]
["pyroxene","Ca(Mg,Mn,Fe)Si2O6","3.22 - 3.56"]
["amphibole","Ca2(Mg,Fe)4Al[Si7AlO22](OH)2","3.02 - 3.59"]
["calcite","(Ca,Mg)CO3","2.715 - 2.94"]
["galena","PbS","7.5 - 7.6"]