Mineral, Metal (Element)

Pyrite

Iron Sulfide (FeS2)

Specular Hematite

Hematite (Fe2O3)

Specular Hematite (Specularite)

Hematite (Alpha-Fe2O3)

Magnetite

Magnetite (Fe3O4)

Hematite

Iron(III) oxide (Fe2O3)

Hypersthene

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

Pyrite

Iron Sulfide (FeS2)

Pyrite (on Quartz matrix)

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock

Pyrite and Fluorite on Quartz (Matrix Specimen)

Iron Disulfide (FeS2) and Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)

Gold Nugget

Native Gold (Au)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Limonite

FeO(OH)·nH2O (Hydrated iron oxide)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Specular Hematite

Specularite (Iron Oxide, Fe2O3)

Magnetite / Ironstone

Magnetite (Fe3O4)

Gold Nugget

Native Gold (Au)

Ironstone (likely siderite or goethite-rich siltstone)

Ferruginous Siltstone

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Mica Schist

Schist (primarily Muscovite and Biotite mica)

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Gold Ore in Quartz

Auriferous Quartz (Gold: Au; Quartz: SiO2)

Barite Rose on Marcasite

Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Black Tourmaline (Schorl)

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

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Gold Nugget

Native Gold (Au)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Specularite (Specular Hematite)

Iron Oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Pyrite (on Quartz/Sulfide matrix)

Iron Sulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Shungite

Shungite (carbon-rich Precambrian mineraloid)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Native Gold (in the form of jewelry)

Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)