Metal (Elemental Mineral)

Native Gold Nugget

Native Gold (Au)

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Hematite Concretion

Iron(III) oxide (Fe2O3)

Shungite

Shungite (Non-crystalline carbon, C)

Gold Flake (Placer Gold)

Native Gold (Au)

Black Tourmaline

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

Hematite (Botryoidal/Kidney Ore)

Iron(III) oxide (Fe2O3)

Galena

Lead(II) sulfide (PbS)

Magnetite

Magnetite (Fe3O4)

Pyrite in Matrix (Commonly called Fool's Gold)

Iron Sulfide (FeS2)

Sunstone

Oligoclase or Andesine (Feldspar Group), (Ca,Na)((Al,Si)4O8)

Nobby Hematite (Iron Ore)

Hematite (Fe2O3)

Gold Nugget / Gold Flakes

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Chalcopyrite ore

Chalcopyrite (CuFeS2)

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Specular Hematite and Magnetite Ore

Iron Oxide (Fe2O3 and Fe3O4)

Pyrite

Iron Disulfide (FeS2)

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Magnetite / Ironstone

Iron(II,III) oxide (Fe3O4)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Disulfide (FeS2)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Mica

Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Hematite (Concretion)

Iron(III) oxide (Fe2O3)

Black Spinel

Magnesium Aluminum Oxide (MgAl2O4)

Magnetite

Magnetite (Fe3O4)

Pyrite in Shale

Iron Disulfide (FeS2)

Galena

Lead(II) sulfide (PbS)

Gold Ore in Quartz/Matrix

Native Gold (Au) in Quartz (SiO2) matrix

Hematite

Iron(III) oxide (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Limonite (Ironstone Concretion)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Iron Pyrites)

Iron Sulfide (FeS2)

Hematite (Iron Ore)

Hematite (alpha-Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Hematite

Iron(III) oxide (Fe2O3)

Hypersthene

Enstatite (Hypersthene variety), (Mg,Fe)SiO3