Mineral (Refined Metal)

Hypersthene

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

Pyrite

Iron Sulfide (FeS2)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Gold Nugget

Native Gold (Au)

Pyrite and Fluorite on Quartz (Matrix Specimen)

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

Magnetite

Magnetite (Fe3O4)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Magnetite or Magnetic Iron Ore

Magnetite (Fe3O4)

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Specular Hematite

Specularite (Iron Oxide, Fe2O3)

Magnetite / Ironstone

Magnetite (Fe3O4)

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Limonite

FeO(OH)·nH2O (Hydrated iron oxide)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Gold Nugget

Native Gold (Au)

Mica Schist

Schist (Crystalline metamorphic rock)

Rutilated Quartz

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Schist (likely Mica Schist)

Mica Schist

Schist

Mica Schist

Pyrite

Iron Sulfide (FeS2)

Yellow Fluorite

Calcium Fluoride (CaF2)

Hematite

Hematite (Fe2O3)

Pyrite

Iron Pyrite (FeS2)

Moqui Marble

Ironstone Concretion (Goethite/Hematite shell with Sandstone core)

Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine

Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions

Gold in Quartz

Gold (Au) in Quartz (SiO2)

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Green Aventurine

Quartz with Fuchsite inclusions (SiO2)

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Green Aventurine

Quartz variety with fuchsite inclusions (SiO2)

Peacock Ore

Bornite (Cu5FeS4) with surface tarnish

Gold Nugget

Native Gold (Au)

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2) with Bornite (Cu5FeS4) oxidation

Tumbled Aventurine

SiO2 (Quartz with Fuchsite inclusions)