Rock Identifier

Category

Man Made Alloy (Metallic)

Browse man made alloy (metallic) specimens identified by the Rock Identifier community.

Basalt (Vesicular and Scoria) (Basalt (extrusive volcanic rock)) — igneous

Basalt (Vesicular and Scoria)

Basalt (extrusive volcanic rock)

Magnetite (likely in Hematite or Ironstone) (Magnetite (Fe3O4)) — mineral

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

Graphite (Graphite (Carbon, C)) — metamorphic

Graphite

Graphite (Carbon, C)

Pyrite and Sunstone (Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)) — mineral

Pyrite and Sunstone

Iron Sulfide (FeS2) and Plagioclase Feldspar ((Ca,Na)Al(Al,Si)Si2O8)

Pyrite (Iron Pyrite (FeS2)) — mineral

Pyrite

Iron Pyrite (FeS2)

Pyrite in Shale (Iron Disulfide (FeS2)) — mineral

Pyrite in Shale

Iron Disulfide (FeS2)

Basalt (Basalt (Mafic igneous rock)) — igneous

Basalt

Basalt (Mafic igneous rock)

Basalt (Basalt (predominantly Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Basalt (predominantly Plagioclase Feldspar and Pyroxene)

Gold Flake / Placer Gold (Native Gold (Au)) — mineral

Gold Flake / Placer Gold

Native Gold (Au)

Pyrite (on host rock/ore) (Iron Sulfide (FeS2)) — mineral

Pyrite (on host rock/ore)

Iron Sulfide (FeS2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Pyrite in Matrix (likely Quartz or Coal) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (likely Quartz or Coal)

Iron Sulfide (FeS2)

Gold Ore (Gold-bearing Quartz (Native Gold, Au)) — mineral

Gold Ore

Gold-bearing Quartz (Native Gold, Au)

Basalt (River Pebble) (Extrusive Mafic Igneous Rock) — igneous

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Basalt (Basalt (Mafic volcanic rock)) — Igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Quartz with Iron Staining (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with iron oxide impurities

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Ferruginous Quartz (Iron-stained Quartz) (Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)

Tree Agate (or Moss Agate) (Dendritic Agate (Silicon Dioxide - SiO2)) — mineral

Tree Agate (or Moss Agate)

Dendritic Agate (Silicon Dioxide - SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Arsenopyrite with Schist Matrix (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Schist Matrix

Arsenopyrite (FeAsS)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Biotite Mica (Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)) — mineral

Biotite Mica

Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)

Galena (Lead Sulfide (PbS)) — mineral

Galena

Lead Sulfide (PbS)

Lapis Lazuli (Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)) — metamorphic

Lapis Lazuli

Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Peacock Ore (Bornite or Chalcopyrite) (Bornite (Cu₅FeS₄) or iridescent Chalcopyrite (CuFeS₂)) — mineral

Peacock Ore (Bornite or Chalcopyrite)

Bornite (Cu₅FeS₄) or iridescent Chalcopyrite (CuFeS₂)

Gold-Bearing Quartz (Silicon Dioxide with Native Gold (SiO2 + Au)) — mineral

Gold-Bearing Quartz

Silicon Dioxide with Native Gold (SiO2 + Au)

Green Aventurine (Silicon Dioxide (SiO2) with inclusions (typically Fuchsite)) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with inclusions (typically Fuchsite)

Pyrite Sun (Pyrite Dollar) (Iron Disulfide (FeS2)) — mineral

Pyrite Sun (Pyrite Dollar)

Iron Disulfide (FeS2)

Chondrite Meteorite (L or H type Ordinary Chondrite) — igneous

Chondrite Meteorite

L or H type Ordinary Chondrite

Anthracite Coal (Anthracite C) — metamorphic

Anthracite Coal

Anthracite C

Sodalite (Sodalite - Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Aventurine (Green) (Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2) — metamorphic

Aventurine (Green)

Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite