Mineral (Refined Metal)

Limonite Concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite

Botryoidal Hematite (Kidney Ore)

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Hematite

Hematite (Fe2O3)

Hematite

Hematite (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Native Gold in Quartz

Native Gold (Au)

Gold Nugget

Native Gold (Au)

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)

Gold Ore / Native Gold

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Gold Flake / Placer Gold

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)

Gold Nugget

Native Gold (Au)

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)