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

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

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

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

Obsidian

Obsidian (Volcanic Glass), primarily SiO2

Blue Apatite (Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]) — mineral

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurity)) — Igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurity)

Natural gemstone and mineral collection (Mixed specimens, including turquoise, tiger’s eye, amethyst, fluorite, pyrite, garnet, rose quartz, lapis lazuli, obsidian, rhodonite, red corundum, labradorite, calcite, lepidolite, sodalite, apatite, and others) — mineral

Natural gemstone and mineral collection

Mixed specimens, including turquoise, tiger’s eye, amethyst, fluorite, pyrite, garnet, rose quartz, lapis lazuli, obsidian, rhodonite, red corundum, labradorite, calcite, lepidolite, sodalite, apatite, and others

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Diorite (Phaneritic intermediate plutonic rock) — igneous

Diorite

Phaneritic intermediate plutonic rock

Obsidian (Obsidian (Volcanic Glass; SiO2 content > 70%)) — igneous

Obsidian

Obsidian (Volcanic Glass; SiO2 content > 70%)

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

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Obsidian (Volcanic Glass (70-75% SiO2)) — igneous

Obsidian

Volcanic Glass (70-75% SiO2)

Black Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Black Obsidian

Volcanic Glass (predominantly SiO2)

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

Obsidian

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

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

Obsidian

Obsidian (Volcanic Glass, SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Green Quartz (Aventurine or Green Quartzite) (SiO2 (Silicon Dioxide) with mica inclusions) — metamorphic

Green Quartz (Aventurine or Green Quartzite)

SiO2 (Silicon Dioxide) with mica inclusions

Pyrite-bearing schist (likely mica schist) (Muscovite/biotite schist with disseminated pyrite (FeS₂)) — metamorphic

Pyrite-bearing schist (likely mica schist)

Muscovite/biotite schist with disseminated pyrite (FeS₂)

Obsidian (Volcanic Glass (SiO2 rich)) — Igneous

Obsidian

Volcanic Glass (SiO2 rich)

Obsidian (Volcanic glass (high silica content based on SiO2)) — igneous

Obsidian

Volcanic glass (high silica content based on SiO2)

Polished banded obsidian (Volcanic glass, predominantly SiO₂; likely banded or mahogany obsidian) — igneous

Polished banded obsidian

Volcanic glass, predominantly SiO₂; likely banded or mahogany obsidian

Obsidian (Obsidian (principally SiO2 silicon dioxide)) — igneous

Obsidian

Obsidian (principally SiO2 silicon dioxide)

Obsidian (likely black obsidian) (Volcanic glass; chiefly silica-rich rhyolitic composition, approximately SiO₂ 70–75%) — igneous

Obsidian (likely black obsidian)

Volcanic glass; chiefly silica-rich rhyolitic composition, approximately SiO₂ 70–75%

Black Obsidian (Obsidian (Volcanic Glass)) — igneous

Black Obsidian

Obsidian (Volcanic Glass)

Ironstone Concretion / Limonite-stained Siltstone (Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)) — sedimentary

Ironstone Concretion / Limonite-stained Siltstone

Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)

Quartz (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Dendritic Agate (Tree Agate) (Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Agate (Tree Agate)

Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Flower Agate (Chalcedony with Opaque Spherulitic Inclusions (SiO2)) — Mineral

Flower Agate

Chalcedony with Opaque Spherulitic Inclusions (SiO2)

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

Quartz with Iron Staining

Silicon Dioxide (SiO2) with iron oxide impurities

Obsidian (likely black volcanic glass) (Obsidian; predominantly rhyolitic glass, mainly SiO₂) — igneous

Obsidian (likely black volcanic glass)

Obsidian; predominantly rhyolitic glass, mainly SiO₂

Ironstone Concretion / Goethite-Hematite Nodule (Goethite/Hematite (α-FeO(OH) / Fe2O3)) — sedimentary

Ironstone Concretion / Goethite-Hematite Nodule

Goethite/Hematite (α-FeO(OH) / Fe2O3)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Obsidian (Obsidian (Volcanic glass), SiO2 (major component)) — igneous

Obsidian

Obsidian (Volcanic glass), SiO2 (major component)

Obsidian (Volcanic glass (Mainly SiO2)) — igneous

Obsidian

Volcanic glass (Mainly SiO2)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Orange Calcite (Banded Calcite) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Orange Calcite (Banded Calcite)

Calcite (Calcium Carbonate, CaCO3)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

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

Obsidian

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

Dendritic Rhodonite (Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3) — mineral

Dendritic Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Weathered metallic sulfide-bearing rock, possibly chalcopyrite ore (Likely chalcopyrite (CuFeS₂) in a weathered host rock; identification is uncertain from the photograph) — mineral

Weathered metallic sulfide-bearing rock, possibly chalcopyrite ore

Likely chalcopyrite (CuFeS₂) in a weathered host rock; identification is uncertain from the photograph

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

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Ironstone Concretion (Limonitic/Hematitic Concretion) — sedimentary

Ironstone Concretion

Limonitic/Hematitic Concretion

Obsidian (Tumbled Apache Tear) (Volcanic Glass (SiO2)) — igneous

Obsidian (Tumbled Apache Tear)

Volcanic Glass (SiO2)