Mineral (Refined Metal)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Schorl (Black Tourmaline) in Quartz and Feldspar

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

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

Gold Ore in Quartz

Auriferous Quartz (SiO2 with Au inclusions)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Schorl (Black Tourmaline)

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

Pyrite

Iron Sulfide (FeS2)

Magnetite (Lodestone)

Magnetite (Fe3O4)

Pyrite (Iron Pyrite)

Iron Disulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Magnetite

Magnetite (Fe3O4)

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Turquoise (with Hematite)

CuAl6(PO4)4(OH)8·4H2O

Magnetite

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Galena

Lead(II) sulfide (PbS)

Gold Nugget

Native Gold (Au)

Auriferous Quartz or Pyritic Ore

Iron Pyrite (FeS2) or Native Gold (Au) in Matrix

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Gold

Gold (Au)

Gold (Placer Gold Nuggets)

Native Gold (Au)

Iron Meteorite

Siderite (Iron-Nickel Meteorite)

Gold Nugget

Native Gold (Au)

Limonite (also known as Yellow Ochre or Brown Hematite)

Limonite (Hydrated iron oxide-hydroxide, FeO(OH)·nH2O)

Botryoidal Hematite (included in Quartz/Limonite matrix)

Fe2O3 (Hematite) on Quartz (SiO2) / Limonite

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Hematite

Iron (III) Oxide (Fe2O3)

Pyrite (Fools Gold)

Iron Sulfide (FeS2)

Pyrite in Matrix (Quartz/Schist)

Iron Sulfide (FeS2)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)