Metal (Elemental Mineral)

Limonite after Pyrite (Pseudomorph)

FeO(OH)·nH2O following FeS2

Pyrite

Iron Pyrite (FeS2)

Sunstone

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

Gold

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Black Tourmaline

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

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Gold

Native Gold (Au)

Turquoise and Hematite

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

Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite in Matrix (likely Quartz or Schist matrix)

Iron Sulfide (FeS2)

Galena

Lead(II) sulfide (PbS)

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Specular Hematite

Specularite (Iron Oxide, Fe2O3)

Gold

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Magnetite / Iron Ore

Magnetite (Fe3O4)

Gold Nugget

Native Gold (Au)

Gold

Native Gold (Au)

Gold

Native Gold (Au)

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

Gold Nugget

Native Gold (Au)

Amethyst and Hematite Bracelet

Amethyst (SiO2) and Hematite (Fe2O3)

Gold flakes

Native Gold (Au)

Graphite

Graphite (Native Carbon, C)

Placer Gold Nugget

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Hematite (Iron Ore)

Hematite (Fe2O3)

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Gold Nugget

Native Gold (Au)

Magnetite Orthorthotropic Rock

Magnetite (Fe3O4)

Limonite Concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite