Rock Identifier

Category

Mineraloid (Man Made)

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

Learn about Mineraloid (Man Made) in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Zincite

Lherzolite

Gondite

Dunite

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Diamond (C (Native Carbon)) — gemstone

Diamond

C (Native Carbon)

Diamond (Natural Diamond (Carbon, C)) — gemstone

Diamond

Natural Diamond (Carbon, C)

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Swirled Agate Bead (Silicon Dioxide (SiO2)) — mineral

Swirled Agate Bead

Silicon Dioxide (SiO2)

Diamond (or Diamond Simulant) (Carbon (C)) — mineral

Diamond (or Diamond Simulant)

Carbon (C)

Diamond (Cut Gemstone) (Natural Carbon (C)) — gemstone

Diamond (Cut Gemstone)

Natural Carbon (C)

Diamond (as set in a metal alloy ring) (Diamond (Pure Carbon, C)) — mineral

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Pearls (likely freshwater cultured pearls) (Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin) — gemstone

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Quartz (Microcrystalline/Chert) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Chert)

Silicon Dioxide (SiO2)

Slag (Industrial Glass Slag) (Amorphous Silica / Ferro-silicate Slag) — mineraloid / anthropogenic

Slag (Industrial Glass Slag)

Amorphous Silica / Ferro-silicate Slag

mineraloid / anthropogenic

Chert (Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Coquina / Fossiliferous Limestone (Fossiliferous Limestone (Calcite, CaCO3)) — sedimentary

Coquina / Fossiliferous Limestone

Fossiliferous Limestone (Calcite, CaCO3)

Flint (Silicon Dioxide (SiO2) - Chert variety) — sedimentary

Flint

Silicon Dioxide (SiO2) - Chert variety

Chert (variations include Flint/Novaculite) (Chert (formula: SiO2)) — sedimentary

Chert (variations include Flint/Novaculite)

Chert (formula: SiO2)

Chert (often called Flint for darker varieties) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Chert (often called Flint for darker varieties)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Granodiorite with Quartz Veining (Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins) — igneous

Granodiorite with Quartz Veining

Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins

Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Polished serpentine pendulum (Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄) — metamorphic

Polished serpentine pendulum

Serpentine-group minerals, chiefly antigorite/lizardite; approximate formula Mg₃Si₂O₅(OH)₄

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Rough Diamond (Diamond (Pure Carbon: C)) — mineral

Rough Diamond

Diamond (Pure Carbon: C)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Mica schist (possibly garnet–mica schist) (Muscovite–biotite schist; chiefly quartz, feldspar, muscovite, and biotite) — metamorphic

Mica schist (possibly garnet–mica schist)

Muscovite–biotite schist; chiefly quartz, feldspar, muscovite, and biotite

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Red Sandstone (Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)) — sedimentary

Red Sandstone

Clastic Sedimentary Mineraloid (predominantly Quartz grains with Iron Oxide cement)

Slag (Industrial Glass) (Artificial Vitreous Silicate) — mineraloid (anthropogenic)

Slag (Industrial Glass)

Artificial Vitreous Silicate

mineraloid (anthropogenic)

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Lapis lazuli and green-blue chalcedony jewelry (Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Mica-rich schist (Muscovite–biotite schist, commonly quartz-bearing) — metamorphic

Mica-rich schist

Muscovite–biotite schist, commonly quartz-bearing

Pink calcite (likely) (Calcite — calcium carbonate, CaCO₃) — mineral

Pink calcite (likely)

Calcite — calcium carbonate, CaCO₃

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Chert (or Flint) (Chert (cryptocrystalline quartz), SiO2) — Sedimentary

Chert (or Flint)

Chert (cryptocrystalline quartz), SiO2

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Coal (Anthracite / Bituminous) (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Coal (Anthracite / Bituminous)

Organic Sedimentary Rock (Carbon-based)

Chert / Green Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / Green Jasper

Silicon Dioxide (SiO2)