Rock Identifier

Category

Igneous Rock (Volcanic Glass)

Browse igneous rock (volcanic glass) specimens identified by the Rock Identifier community.

Learn about Igneous Rock (Volcanic Glass) in the encyclopedia

Rock Gypsum

Coral Rock

Rock Salt

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Black Obsidian

Obsidian

Pink Obsidian

Sideromelane

Carbonatite

Tachylite

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Pumice (Felsic volcanic glass) — igneous

Pumice

Felsic volcanic glass

Obsidian (Volcanic Glass (Silica-rich glass)) — igneous

Obsidian

Volcanic Glass (Silica-rich glass)

Snowflake Obsidian (Obsidian with Cristobalite inclusions) — igneous

Snowflake Obsidian

Obsidian with Cristobalite inclusions

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Blue Agate (Silicon dioxide (Chalcedony), SiO2) — sedimentary

Blue Agate

Silicon dioxide (Chalcedony), SiO2

Pumice (Pumice (Vesicular Rhyolite/Andesite)) — igneous

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Pumice (Pumice) — igneous

Pumice

Pumice

Obsidian (Volcanic Glass (Silica-rich glass)) — igneous

Obsidian

Volcanic Glass (Silica-rich glass)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

Pumice (Pumice (Vesicular Rhyolite/Andesite)) — igneous

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Apache Tear (Obsidian (Volcanic Glass)) — igneous

Apache Tear

Obsidian (Volcanic Glass)

Black Obsidian (Volcanic Glass (Silica glass with magnetite/hematite microcrystals)) — igneous

Black Obsidian

Volcanic Glass (Silica glass with magnetite/hematite microcrystals)

Pumice (Pumice (Volcanic Rock)) — igneous

Pumice

Pumice (Volcanic Rock)

Rounded porous volcanic rock (likely scoria) (Scoria, vesicular basalt) — igneous

Rounded porous volcanic rock (likely scoria)

Scoria, vesicular basalt

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Pumice (Volcanic glass froth) — igneous

Pumice

Volcanic glass froth

Agate (Silicon dioxide (SiO2)) — gemstone

Agate

Silicon dioxide (SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Pumice (Pumice (Amorphous volcanic glass)) — Igneous

Pumice

Pumice (Amorphous volcanic glass)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Snowflake Obsidian (Volcanic Glass with Cristobalite) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite

Black Obsidian (Volcanic Glass (felsic)) — igneous

Black Obsidian

Volcanic Glass (felsic)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Pumice (or Volcanic Tuff / Ash) (Pumice / Pyroclastic rock) — igneous

Pumice (or Volcanic Tuff / Ash)

Pumice / Pyroclastic rock

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

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

Obsidian

Volcanic Glass (SiO2 with impurities)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Rhyolitic Tuff (Rhyolitic Tuff / Pyroclastic rock) — igneous

Rhyolitic Tuff

Rhyolitic Tuff / Pyroclastic rock

Snowflake Obsidian (Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)

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

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Basalt (Aphanitic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Igneous Rock)

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Pumice (Felsic volcanic rock) — igneous

Pumice

Felsic volcanic rock

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

Snowflake obsidian beads (Obsidian, volcanic glass (predominantly SiO₂), with pale cristobalite/spherulitic inclusions) — igneous

Snowflake obsidian beads

Obsidian, volcanic glass (predominantly SiO₂), with pale cristobalite/spherulitic inclusions