Common Minerals

Quartz SiO2	Halite NaCl	Muscovite KAl2(AlSi3O10) (OH)2	Biotite K(Mg,Fe)3 (AlSi3O10)(OH)2	Plagioclase NaAlSi3O8 CaAlSi3O8
Quartz SiO2	Gypsum CaSO4-2H2O	Limonite Fe2O3-n H2O	Garnet (Mg,Fe,Mn,Ca)3 (Al,Fe,Cr)2(SiO4)3	Orthoclase KAlSi3O8
Quartz SiO2(amethyst)	Kaolinite Al4(Si4O10(OH)8	Talc Mg3Si4O10)(OH)2	Sulfur S	Galena PbS
Rose Quartz SiO2	Hornblende (Ca,Na)2,3(Mg,Fe, Al)5Si6(Si,Al)2O22 (OH)2	Magnetite Fe3O4	Pyrite Fe2S	Hematite Fe2O3

Calcite CaCO3	Graphite C