Mineral, Metal (Element)

Pyrite

Iron Sulfide (FeS2)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Bixbyite on Rhyolite

Bixbyite (Mn2+,Fe3+)2O3

Native Gold (in Jewelry form)

Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Magnetite / Iron Ore

Magnetite (Fe3O4)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Muscovite Mica (with Quartz)

Muscovite (KAl2(AlSi3O10)(OH)2)

Specular Hematite Geode/Nodule

Specularite (Polycrystalline Hematite), Fe2O3

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite in Shale

Iron Disulfide (FeS2) in Sedimentary Shale

Pyrite

Iron Sulfide (FeS2)

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite in Matrix (likely Quartz or Coal)

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Moissanite

Silicon Carbide (SiC)

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Iron Ore)

Goethite and related iron hydroxides (FeO(OH)·nH2O)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Gold Nugget

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Limonite (Iron Stone/Goethite)

Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))

Hematite

Iron(III) oxide (Fe2O3)

Galena

Lead(II) sulfide (PbS)

Ironstone Concretion (Moqui Marble)

Hematite/Goethite Concretion (Fe2O3 / FeO(OH))

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Sunstone

Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Fluorite

Calcium Fluoride (CaF2)

Mica Schist

Schist (Crystalline metamorphic rock)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Serpentine

Serpentine group minerals (e.g., Antigorite, Chrysotile, Lizardite). Chemical formula: (Mg, Fe)₃Si₂O₅(OH)₄

Fluorite

Calcium Fluoride (CaF2)

Chondrite Meteorite

Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)