Image credit: James St. John
Uncredited images and diagrams: Scott Brande
augite bauxite biotite calcite chalcopyrite
copper corundum K-feldspar fluorite galena
garnet graphite gypsum hematite halite
hornblende limonite magnetite muscovite olivine
plagioclase quartz microcrystalline quartz sulfur
staurolite sphalerite talc
limonite
image credit: James St. John
FeO(OH) · nH2O complex chemical formula
(interpreting mineral chemical formulas: atoms, molecules, elements)
Minerals.net
Webminerals
Mineralogical Society of America