Metal (Elemental Mineral)

Gold Nugget

Native Gold (Au)

Tumbled Hematite

Hematite (Alpha iron oxide, Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Arfvedsonite

Arfvedsonite [Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2]

Pyrite

Iron Sulfide (FeS2)

Magnetite / Ironstone

Magnetite (Fe3O4)

Gold-bearing Quartz (Auriferous Quartz)

Quartz (SiO2) with native Gold (Au) inclusions

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Arsenopyrite

Arsenopyrite (FeAsS)

Hematite

Iron (III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Hematite (Botryoidal)

Hematite (Fe2O3)

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Pyrite-rich Gossan

Iron Sulfide (FeS2) in Ore Matrix

Magnetite

Magnetite (Fe3O4)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Magnetite with Serpentine

Magnetite (Fe3O4) in Serpentine Matrix

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Bronzite

(Mg,Fe)SiO3

Hematite

Hematite (Fe2O3)

Gold in Quartz Matrix

Native Gold (Au) in Quartz (SiO2)

Hematite

Hematite (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite

Iron Disulfide (FeS2)

Native Gold in Quartz

Native Gold (Au)

Bixbyite on Rhyolite

Bixbyite (Mn2+,Fe3+)2O3

Earthy Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Native Copper

Native Copper (Cu)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Bort or Carbonado

C - Polycrystalline Diamond

Gold Ore / Native Gold

Native Gold (Au)

Native Gold (in Jewelry form)

Gold (Au)

Gold Nugget

Native Gold (Au)

Gold Flake / Placer Gold

Native Gold (Au)

Pyrite in Shale

Iron Disulfide (FeS2) in Sedimentary Shale

Pyrite

Iron Sulfide (FeS2)

Magnetite Sand (Black Sand)

Magnetite (Fe3O4)