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

Sandstone or Mudstone (Sedimentary Rock) — sedimentary

Sandstone or Mudstone

Sedimentary Rock

Quartzite (Metamorphosed Quartz Sandstone) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone

Quartzite Pebbles (Quartzite (SiO2)) — metamorphic

Quartzite Pebbles

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

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

Black Obsidian

Obsidian (Volcanic Glass, SiO2+)

Quartzite pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite pebble

Quartzite (primarily SiO2)

Quartzite Cobble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Cobble

Metamorphosed Quartz Sandstone (SiO2)

Quartzite River Stone (Quartzite (SiO2)) — metamorphic

Quartzite River Stone

Quartzite (SiO2)

Siltstone (Siltstone (primarily SiO2 with Al2O3)) — sedimentary

Siltstone

Siltstone (primarily SiO2 with Al2O3)

Tektite (Indochinite (Tektite)) — igneous

Tektite

Indochinite (Tektite)

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite (Quartzite (high SiO2 content)) — metamorphic

Quartzite

Quartzite (high SiO2 content)

Quartzite pebble (Metamorphic rock (mainly SiO2)) — metamorphic

Quartzite pebble

Metamorphic rock (mainly SiO2)

Limestone (Limestone (Calcium Carbonate - CaCO3)) — sedimentary

Limestone

Limestone (Calcium Carbonate - CaCO3)

Snowflake Obsidian (Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)

Gray Quartzite River Rock (Meta-quartzite (SiO2)) — metamorphic

Gray Quartzite River Rock

Meta-quartzite (SiO2)

Pebble (likely Siltstone or fine-grained Sandstone) (Sedimentary Clastic Rock) — sedimentary

Pebble (likely Siltstone or fine-grained Sandstone)

Sedimentary Clastic Rock

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Riverstone Quartzite (Quartzite (primarily SiO2)) — metamorphic

Riverstone Quartzite

Quartzite (primarily SiO2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Quartzite Pebble (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite Pebble

Quartzite (composed primarily of SiO2)

Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Silica (SiO2·nH2O)

Quartzite (River Pebble) (Quartzite, dominated by Silicon Dioxide (SiO2)) — metamorphic

Quartzite (River Pebble)

Quartzite, dominated by Silicon Dioxide (SiO2)

Quartzite River Rock (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Metamorphic Quartzite (primarily SiO2)

Greenstone (Celadonite-bearing Volcanic) (Hydrothermally altered basalt or andesite with Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)) — metamorphic

Greenstone (Celadonite-bearing Volcanic)

Hydrothermally altered basalt or andesite with Celadonite (K(Mg,Fe2+)(Fe3+,Al)Si4O10(OH)2)

Greenstone (Greenschist facies) (Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)) — metamorphic

Greenstone (Greenschist facies)

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Quartzite (Quartzite (Metamorphic rock composed primarily of quartz)) — metamorphic

Quartzite

Quartzite (Metamorphic rock composed primarily of quartz)

Generic Pebble (Lithic Fragment) — sedimentary

Generic Pebble

Lithic Fragment

Black Obsidian (Volcanic glass) — igneous

Black Obsidian

Volcanic glass

Quartzite (Metamorphic Quartz Sandstone) — metamorphic

Quartzite

Metamorphic Quartz Sandstone

Quartzite (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite

Metamorphic Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Chert (Jasper / Petrified Wood) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper / Petrified Wood)

Microcrystalline Quartz (SiO2)

River Rock (Basalt or Siltstone) (Basalt (Aphanitic Igneous Rock)) — igneous

River Rock (Basalt or Siltstone)

Basalt (Aphanitic Igneous Rock)

Gold Sheen Obsidian (Volcanic Glass (SiO2 with inclusions)) — igneous

Gold Sheen Obsidian

Volcanic Glass (SiO2 with inclusions)

Quartzite Cobble (Quartzite (SiO2)) — metamorphic

Quartzite Cobble

Quartzite (SiO2)

Black Obsidian (Extrusive Volcanic Glass (primarily SiO2)) — igneous

Black Obsidian

Extrusive Volcanic Glass (primarily SiO2)

Common Opal (Hydrated silica (SiO2 "n"H2O)) — mineral

Common Opal

Hydrated silica (SiO2 "n"H2O)

Quartzite with inclusions (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite with inclusions

Metamorphic Quartzite (SiO2)

Mahogany Obsidian (Volcanic Glass with Hematite inclusions) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite inclusions