Mineral (Refined Metal)

Pyrite in Shale

Iron Sulfide (FeS2) in Sedimentary Matrix

Labradorite

(Ca, Na)(Al, Si)4O8

Graphite

Graphite (C)

Pyrite in Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Hematite

Iron Oxide (Fe2O3)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Specular Hematite (Specularite) in Matrix

Specularite (Fe2O3)

Graphite

Graphite (Carbon, C)

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Red Aventurine / Orange Quartzite

Silicon Dioxide (SiO2) with hematite/goethite inclusions

Polished Hematite Tower

Hematite (Fe2O3)

Limonite / Brown Iron Ore

Hydrous Iron Oxide (FeO(OH)·nH2O)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Limonite (often after Pyrite)

Limonite (FeO(OH)·nH2O)

Banded Iron Formation

BIF (Banded Iron Formation)

Native Copper

Copper (Cu)

Tumbled Hematite

Hematite (Fe2O3)

Hematite

Hematite (Iron (III) oxide, Fe2O3)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Magnetite (potentially Lodestone)

Magnetite (Iron(II,III) oxide, Fe3O4)

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Gold

Native Gold (Au)

Chromite

Chromite (FeCr2O4)

Pyrite

Iron Sulfide (FeS2)

Hematite (Ironstone) Nodule

Hematite (Fe2O3)

Pyrite (Fools Gold)

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite in Matrix

Iron Sulfide (FeS2)

Magnetite (Small Granule)

Magnetite (Fe3O4)

Molybdenite in Quartz

Molybdenite (MoS2) with Quartz (SiO2)

Native Gold Nugget

Native Gold (Au)

Pyrite

Iron Disulfide (FeS2)

Turquoise and Hematite

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)

Red Hematite

Iron(III) oxide (Fe2O3)

Hematite Mineral Ore

Iron(III) oxide (Fe2O3)

Chromium (Chrome)

Chromium (Cr)

Pyrite

Iron Sulfide (FeS2)