Mineral (Refined Metal)

Specular Hematite

Hematite (Iron Oxide, Fe2O3)

Native Gold

Native Gold (Au)

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Moissanite

Silicon Carbide (SiC)

Pyrite

Iron Sulfide (FeS2)

Schorl (Black Tourmaline) in Matrix

Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Galena

Lead(II) sulfide (PbS)

Specular Hematite

Iron Oxide (Fe2O3)

Black Tourmaline

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

Gold-bearing Quartz

Lode Gold in Silicon Dioxide (SiO2)

Silicon

Silicon (Si)

Gold

Native Gold (Au)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Native Copper within Host Rock

Native Copper (Cu)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Tiger's Eye (and Hematite/Jasper Matrix)

SiO2 (Pseudomorph of Quartz after Crocidolite) with Hematite/Magnetite

Pyrite (on host rock)

Iron Sulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Chalcopyrite in Matrix

Chalcopyrite (CuFeS2)

Quartz with Pyrite

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Pyrite (on Quartz matrix)

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Gold and Diamond

Native Gold (Au) and Diamond (C)

Hematite

Iron(III) oxide (Fe2O3)

Gold Flakes

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite in Matrix

Iron Sulfide (FeS2)

Silicon Carbide (Carborundum)

Moissanite (SiC), though mostly synthetic

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Gold-bearing Quartz

Auriferous Quartz (SiO2 with native Au)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Pyrite in Matrix (Fool's Gold)

Iron Sulfide (FeS2)

Fossilized Tiger Shark Tooth

Galeocerdo cuvier (fossilized hydroxylapatite)