Rock Identifier

Category

Anthropic Metallic Specimen

Browse anthropic metallic specimen specimens identified by the Rock Identifier community.

Pyrite in Shale (Iron Sulfide (FeS2) in Sedimentary Matrix) — mineral

Pyrite in Shale

Iron Sulfide (FeS2) in Sedimentary Matrix

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

Basalt Pebble

Basalt (Extrusive Igneous Rock)

Basalt River Pebble (Mafic volcanic rock (Basalt)) — igneous

Basalt River Pebble

Mafic volcanic rock (Basalt)

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

Lapis Lazuli with Pyrite

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

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Limonite (with goethite) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (with goethite)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Basalt (River Pebble)

Extrusive Mafic Igneous Rock

Basalt (Basalt) — igneous

Basalt

Basalt

Sunstone (Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8

Titanium Quartz (Rough) (Titanium-included Silicon Dioxide (SiO2 + Ti)) — mineral

Titanium Quartz (Rough)

Titanium-included Silicon Dioxide (SiO2 + Ti)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Placer Gold Nugget (Native Gold (Au)) — mineral

Placer Gold Nugget

Native Gold (Au)

Unidentified dark metallic sulfide specimen (Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing) — mineral

Unidentified dark metallic sulfide specimen

Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Native Silver Nugget (Silver (Ag)) — mineral

Native Silver Nugget

Silver (Ag)

Quartz with Schorl inclusions (Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate Hydroxide (Black Tourmaline)) — mineral

Quartz with Schorl inclusions

Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate Hydroxide (Black Tourmaline)

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Iron meteorite fragment (Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment) — meteorite

Iron meteorite fragment

Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment

Quartz with Sericite and Cinnabar (Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)) — mineral

Quartz with Sericite and Cinnabar

Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)

Fluorite (Calcium fluoride, CaF2) — Mineral

Fluorite

Calcium fluoride, CaF2

Gold Nugget (Placer Gold) (Native Gold (Au)) — mineral

Gold Nugget (Placer Gold)

Native Gold (Au)

Pyrite (likely), “fool’s gold” (Pyrite, FeS₂ (iron disulfide)) — mineral

Pyrite (likely), “fool’s gold”

Pyrite, FeS₂ (iron disulfide)

Iron-rich sandstone or weathered laterite fragment (Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂ with iron oxides such as hematite/goethite)) — sedimentary

Iron-rich sandstone or weathered laterite fragment

Quartz-rich sandstone, possibly ferruginous sandstone (SiO₂ with iron oxides such as hematite/goethite)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Tourmalinated Quartz / Tourmaline in Matrix (Silicate mineral group (Schorl / Quartz)) — mineral

Tourmalinated Quartz / Tourmaline in Matrix

Silicate mineral group (Schorl / Quartz)

Pyrite in Matrix (Fool's Gold) (Iron Disulfide (FeS2)) — mineral

Pyrite in Matrix (Fool's Gold)

Iron Disulfide (FeS2)

Basalt pebble (Basalt) — igneous

Basalt pebble

Basalt

Basalt (Mafic volcanic rock) — igneous

Basalt

Mafic volcanic rock

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

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

Hematite Concretion

Iron(III) oxide (Fe2O3)

Nuummite (Orthoamphibole (Gedrite-Anthophyllite series)) — metamorphic

Nuummite

Orthoamphibole (Gedrite-Anthophyllite series)

Specular Hematite (Hematite (Fe2O3)) — mineral

Specular Hematite

Hematite (Fe2O3)

Milky Quartz with Dendritic Inclusions (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Milky Quartz with Dendritic Inclusions

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Iron-rich quartzite or silicified ironstone (Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite and possibly hematite) — metamorphic

Iron-rich quartzite or silicified ironstone

Quartz (SiO₂) with iron oxides/hydroxides, likely limonite/goethite and possibly hematite

Gneissic Schist (Gneiss-schist (Metamorphic rock)) — metamorphic

Gneissic Schist

Gneiss-schist (Metamorphic rock)

Weathered brown stone, likely basalt or iron-stained volcanic rock (Indeterminate; possibly vesicular basalt (mafic silicate rock)) — igneous

Weathered brown stone, likely basalt or iron-stained volcanic rock

Indeterminate; possibly vesicular basalt (mafic silicate rock)

Sunstone (Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)) — mineral

Sunstone

Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)