Anthropic Metallic Specimen

Magnetite / Iron Ore (likely Hematite-Magnetite mix)

Magnetite (Fe3O4)

Banded Iron Formation (BIF) / Tiger Iron

Banded Iron Formation containing Hematite (Fe2O3) and Magnetite (Fe3O4)

Shungite

Non-crystalline carbonoid (Shungite)

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Gold Ore

Native Gold (Au)

Anthracite Coal

Anthracite (a variety of coal, predominantly carbon)

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Hematite

Iron(III) oxide (Fe2O3)

Magnetite / Ironstone

Iron(II,III) oxide (Fe3O4)

Lapis Lazuli

Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Hematite (Botryoidal/Kidney Ore)

Iron(III) oxide (Fe2O3)

Hematite Concretion

Iron oxide (Fe2O3) in concretionary form

Magnetite

Magnetite (Fe3O4)

Pyritic Mudstone

Argillaceous rock (FeS2)

Specular Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Specular Hematite Geode/Nodule

Specularite (Polycrystalline Hematite), Fe2O3

Pyrite in Shale

Iron Disulfide (FeS2) in Argillaceous Shale

Red Hematite

Iron(III) Oxide (Fe2O3)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Pyrite in Quartz

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)

Banded Iron Formation (BIF)

Banded Iron Formation (predominantly Hematite and Chert)

Bronzite

(Mg,Fe)SiO3

Hematite

Iron(III) oxide (Fe2O3)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Anthracite Coal

Anthracite

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with tarnish

Specular Hematite

Hematite (Fe2O3)

Silver (Native or Alloyed)

Ag (Argentum)

Gold-bearing Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Iron Meteorite (Candidate)

Iron Meteorite (Siderite)

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock

Hematite

Iron(III) oxide (Fe2O3)

Anthracite Coal

Anthracite

Earthy Hematite (Iron Ore)

Iron(III) oxide (Fe2O3)

Banded Iron Formation (BIF) / Ironstone

Ferruginous sedimentary rock (Fe2O3 + SiO2)

Conglomerate with Native Copper

Clastic Sedimentary Rock with Native Copper (Cu)

Magnetite / Ironstone

Magnetite (Fe3O4)

Hematite Nodules (Moqui Marbles)

Ferric Oxide (Fe2O3)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Graphite Schist

C (Carbonaceous Schist)