Rock Identifier

Category

Non Geological

Browse non geological specimens identified by the Rock Identifier community.

Learn about Non Geological in the encyclopedia

Common Opal

Mudstone

Green Beryl

Matte Obsidian

Sapphire

Hornfels

Argillite

Mint Opal

Plazolite

Bixbite

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Ferruginous Quartzite (Red Quartzite) (Quartzite (primarily SiO2 with Fe2O3 inclusions)) — metamorphic

Ferruginous Quartzite (Red Quartzite)

Quartzite (primarily SiO2 with Fe2O3 inclusions)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Black Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Mahogany Obsidian (Obsidian (Volcanic Glass with Hematite inclusions)) — igneous

Mahogany Obsidian

Obsidian (Volcanic Glass with Hematite inclusions)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Obsidian (Volcanic glass (SiO2-rich)) — igneous

Obsidian

Volcanic glass (SiO2-rich)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Opalite (Man-made Glass) (Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)) — Synthetic Mineral Simulant / Glass

Opalite (Man-made Glass)

Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)

Synthetic Mineral Simulant / Glass

Quartzite (Metamorphosed Sandstone (Mainly SiO2)) — metamorphic

Quartzite

Metamorphosed Sandstone (Mainly SiO2)

Obsidian (Volcanic Glass (Primary component: SiO2)) — igneous

Obsidian

Volcanic Glass (Primary component: SiO2)

Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

Shale or Siltstone (Sedimentary Rock (Siliciclastic)) — sedimentary

Shale or Siltstone

Sedimentary Rock (Siliciclastic)

Siltstone or Fine-grained Sandstone pebble (Siltstone (primarily SiO2 with clay minerals)) — sedimentary

Siltstone or Fine-grained Sandstone pebble

Siltstone (primarily SiO2 with clay minerals)

Slag Glass (Anthropogenic Amorphous Silicon Dioxide) — mineral

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Quartzite pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite pebble

Quartzite (primarily SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Quartzite (Quartzite (Primary mineral: SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Anthracite Coal (Anthracite (Carbon Content: 86%-97%)) — metamorphic

Anthracite Coal

Anthracite (Carbon Content: 86%-97%)

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

Black Obsidian

Volcanic Glass (predominantly SiO2)

Tumbled green gemstone, likely dyed howlite or serpentine (Most consistent with dyed howlite (Ca2B5SiO9(OH)5); exact identification requires testing) — mineral

Tumbled green gemstone, likely dyed howlite or serpentine

Most consistent with dyed howlite (Ca2B5SiO9(OH)5); exact identification requires testing

Apache Tear (Obsidian) (Obsidian / Amorphous Volcanic Glass (primarily SiO2)) — igneous

Apache Tear (Obsidian)

Obsidian / Amorphous Volcanic Glass (primarily SiO2)

Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related) (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related)

Volcanic Glass (70% or more SiO2)

Amber (Succinite (fossilized resin); C10H16O) — mineraloid

Amber

Succinite (fossilized resin); C10H16O

Weathered sandstone cobble (Quartz-rich sandstone, primarily SiO₂ with clay/iron-oxide cement) — sedimentary

Weathered sandstone cobble

Quartz-rich sandstone, primarily SiO₂ with clay/iron-oxide cement

Quartz (Iron-stained) (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

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

Black Obsidian

Volcanic Glass (SiO2 + impurities)

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Quartzite (Quartzite (chiefly SiO2)) — metamorphic

Quartzite

Quartzite (chiefly SiO2)

Shale (with minor calcite veining) (Clastic sedimentary rock (primarily clay minerals and quartz)) — sedimentary

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

Obsidian (Obsidian (Amorphous volcanic glass, SiO2 with impurities)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass, SiO2 with impurities)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Garnet (Almandine variety) (Almandine, Fe3Al2(SiO4)3) — Mineral

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Quartzite with Iron Oxide Vein (Metamorphic Quartzite (SiO2 with Hematite/Limonite impurities)) — metamorphic

Quartzite with Iron Oxide Vein

Metamorphic Quartzite (SiO2 with Hematite/Limonite impurities)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Rainbow Obsidian (Volcanic glass (SiO2 - approximately 70% or more silicon dioxide)) — Igneous

Rainbow Obsidian

Volcanic glass (SiO2 - approximately 70% or more silicon dioxide)

Obsidian (Black Obsidian) (Amorphous volcanic glass (primarily SiO2)) — igneous

Obsidian (Black Obsidian)

Amorphous volcanic glass (primarily SiO2)