Rock Identifier

Category

Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)

Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.

Learn about Industrial Byproduct (Often Mistaken For Obsidian Or Mineral) in the encyclopedia

Porphyritic Obsidian

Porphyritic Obsidian

Gray Obsidian

Red Obsidian

Starry Night Obsidian

Gold Sheen Obsidian

Pink Lady Obsidian

Anatase

Euxenite

Double Flow Obsidian

Aventurine

Black Shale

Peacock Ore

Obsidian (Amorphous volcanic glass (70-75% SiO2)) — igneous

Obsidian

Amorphous volcanic glass (70-75% SiO2)

Obsidian (Obsidian (Volcanic Glass, SiO2)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2)

Ironstone Concretion (Siderite or Limonite Concretion) — sedimentary

Ironstone Concretion

Siderite or Limonite Concretion

Weathered metallic sulfide ore, likely pyrite-bearing rock (Pyrite (FeS₂), possibly in a quartz–iron-oxide host) — mineral

Weathered metallic sulfide ore, likely pyrite-bearing rock

Pyrite (FeS₂), possibly in a quartz–iron-oxide host

Tiffany Stone (Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)) — metamorphic

Tiffany Stone

Bertrandite Fluorite (CaF2 + Be4Si2O7(OH)2)

Red Quartz (Ferruginous Quartz) (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — mineral

Red Quartz (Ferruginous Quartz)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Ironstone Concretion (Ferruginous Sandstone / Iron-rich Sedimentary Rock) — sedimentary

Ironstone Concretion

Ferruginous Sandstone / Iron-rich Sedimentary Rock

Obsidian (Volcanic Glass (SiO2 rich)) — igneous

Obsidian

Volcanic Glass (SiO2 rich)

Obsidian (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Perlite (Unexpanded) (Amorphous volcanic glass) — igneous

Perlite (Unexpanded)

Amorphous volcanic glass

Obsidian (Obsidian (principally SiO2 - Silicon Dioxide)) — igneous

Obsidian

Obsidian (principally SiO2 - Silicon Dioxide)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Lepidodendron Fossil (Scale Tree) (Lepidodendron sp.) — fossil

Lepidodendron Fossil (Scale Tree)

Lepidodendron sp.

Ironstone Concretion (Ferruginous Concretion) — sedimentary

Ironstone Concretion

Ferruginous Concretion

Obsidian (Volcanic glass (SiO2 - Silicon dioxide predominant composition)) — Igneous

Obsidian

Volcanic glass (SiO2 - Silicon dioxide predominant composition)

Obsidian (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian

Volcanic Glass (70% or more SiO2)

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — Igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Obsidian (Obsidian (Amorphous volcanic glass, predominantly SiO2)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass, predominantly SiO2)

Obsidian (Obsidian (Volcanic Glass) SiO2 (70% or more)) — igneous

Obsidian

Obsidian (Volcanic Glass) SiO2 (70% or more)

Obsidian (Volcanic glass (SiO2)) — igneous

Obsidian

Volcanic glass (SiO2)

Quartzite with Hematite staining (Quartzite (SiO2)) — metamorphic

Quartzite with Hematite staining

Quartzite (SiO2)

Ironstone Concretion (Limonite/Goethite) (Ferruginous Siltstone / Limonite Concretion (FeOO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Ferruginous Siltstone / Limonite Concretion (FeOO(OH)·nH2O)

Concretion (Septarian Concretion (Clay-Ironstone Nodules)) — sedimentary

Concretion

Septarian Concretion (Clay-Ironstone Nodules)

Concretion with Quartz Veining (Septarian Concretion (CaCO3 / SiO2)) — sedimentary

Concretion with Quartz Veining

Septarian Concretion (CaCO3 / SiO2)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — Igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Tumbled black tourmaline (Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4) — mineral

Tumbled black tourmaline

Schorl tourmaline, NaFe3Al6(BO3)3Si6O18(OH)4

Polished blue obsidian with a pale mineral crust (Obsidian (volcanic glass), likely coated or encrusted with quartz/calcite) — igneous

Polished blue obsidian with a pale mineral crust

Obsidian (volcanic glass), likely coated or encrusted with quartz/calcite

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)) — Mineral (variety of Quartz)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)

Mineral (variety of Quartz)

Obsidian (Obsidian (Volcanic glass), SiO2 (70% or more)) — igneous

Obsidian

Obsidian (Volcanic glass), SiO2 (70% or more)

Obsidian (Volcanic Glass (SiO2 + impurities)) — igneous

Obsidian

Volcanic Glass (SiO2 + impurities)

Dumortierite Quartz (Al7BO3(SiO4)3O3 (Borosilicate mineral/Quartz inclusion)) — mineral

Dumortierite Quartz

Al7BO3(SiO4)3O3 (Borosilicate mineral/Quartz inclusion)

Black tourmaline (likely schorl) (Schorl, sodium–iron tourmaline: NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) — mineral

Black tourmaline (likely schorl)

Schorl, sodium–iron tourmaline: NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Tumbled smoky quartz (probable) (Quartz, silicon dioxide (SiO₂), smoky variety) — mineral

Tumbled smoky quartz (probable)

Quartz, silicon dioxide (SiO₂), smoky variety

Mahogany Obsidian (Volcanic glass (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic glass (SiO2 + Fe2O3)

Dumortierite Quartz (Al7(BO3)(SiO4)3O3) — mineral

Dumortierite Quartz

Al7(BO3)(SiO4)3O3