Mineral (Refined Metal)

Pyrite

Iron Sulfide (FeS2)

Gold

Native gold (Au)

Pyrite in Matrix

Iron Sulfide (FeS2)

Hematite

Iron Oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Tumbled Hematite

Iron(III) oxide (Fe2O3)

Magnetite Nodule

Magnetite (Fe3O4)

Botryoidal Hematite (Kidney Ore)

Iron(III) oxide (Fe2O3)

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Hematite Nodules (Moqui Marbles or similar)

Iron oxide (Fe2O3)

Native Gold

Native Gold (Au)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Magnetite (Iron Ore)

Iron(II,III) oxide (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Aura Quartz (Titanium-coated Quartz)

Silicon Dioxide (SiO2) with metallic vapor coating

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Gold

Gold (Native Element); Au

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Gold

Native Gold (Au)

Limonite (Ironstone)

Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Pyrite in Quartzite/Graphite Matrix

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Silver (Native Element)

Ag (Native Silver), with minor Copper (Cu)

Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Hematite Nodule

Hematite (Fe2O3)

Gold Flakes (Placer Gold)

Gold (Au)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pyrite (locally known as Fool's Gold)

Iron Sulfide (FeS2)

Hematite

Hematite, Iron(III) oxide (Fe2O3)

Moissanite

Silicon Carbide (SiC)

Goethite

Goethite (FeO(OH))

Specular Hematite

Specularite (Iron Oxide, Fe2O3)

Iridium sand or Osmium-Iridium nugget

Iridosmine / Osmiridium (Platinoid grouping)

Shungite

Non-crystalline carbon (Fullerene-bearing)