Mineral (Refined Metal)

Hematite (Iron Ore)

Hematite (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Galena

Lead(II) sulfide (PbS)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Black Tourmaline

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

Hematite

Iron(III) oxide (Fe2O3)

Magnetite

Magnetite (Fe3O4)

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)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Turquoise (with Hematite)

CuAl6(PO4)4(OH)8·4H2O

Magnetite (Lodestone)

Magnetite (Fe3O4)

Schorl (Black Tourmaline)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite (Iron Pyrite)

Iron Disulfide (FeS2)

Gold Ore in Quartz

Auriferous Quartz (SiO2 with Au inclusions)

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)

Gold

Gold (Au)

Gold (Placer Gold Nuggets)

Native Gold (Au)

Magnetite

Magnetite (Fe3O4)

Gold Nugget

Native Gold (Au)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Botryoidal Hematite (included in Quartz/Limonite matrix)

Fe2O3 (Hematite) on Quartz (SiO2) / Limonite

Hematite

Iron (III) Oxide (Fe2O3)

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Native Copper in Basalt

Cuprum (with Host Basalt)

Mica Schist

Mica Schist