Metal (Elemental Mineral)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Polished Hematite Tower

Hematite (Fe2O3)

Magnetite or Hematite (Iron Stone)

Magnetite (Fe3O4) or Hematite (Fe2O3)

Magnetite (Octahedral Crystal)

Magnetite (Fe3O4)

Gold Ore

Native Gold (Au) in Quartz or Silicate matrix

Mixed Mineral Collection (with Titanium Aura Quartz)

Silicon Dioxide (SiO2) with metallic coatings and various silicates

Pyrite

Iron Disulfide (FeS2)

Black Tourmaline (Schorl)

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Hematite Pebble

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold) in Matrix

Iron Disulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Black Tourmaline (Schorl)

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

Gold Nugget

Native Gold (Au)

Turquoise and Hematite

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

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Gold Nugget

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Gold

Native Gold (Au)

Gold

Native Gold (Au)

Gold

Native Gold (Au)

Limonite (with Goethite/Hematite glaze)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Gold Nugget (or Gold Grain)

Native Gold (Au)

Galena

Lead(II) sulfide (PbS)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Specular Hematite

Specularite (Iron Oxide, Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Limonite after Pyrite (Pseudomorph)

FeO(OH)·nH2O following FeS2

Gold Nugget

Native Gold (Au)

Hematite Nodular Concretion

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)