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

Basalt (Pahoehoe texture) (Mafic Volcanic Rock) — igneous

Basalt (Pahoehoe texture)

Mafic Volcanic Rock

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

Black Obsidian Carving

Volcanic Glass (Amorphous Silicon Dioxide)

Pumice (Pumice) — igneous

Pumice

Pumice

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Pumice (Pumice (volcanic glass rock)) — igneous

Pumice

Pumice (volcanic glass rock)

Pumice (Pumice (volcanic glass rock)) — igneous

Pumice

Pumice (volcanic glass rock)

Black obsidian (probable) (Volcanic glass; primarily SiO₂-rich rhyolitic composition) — igneous

Black obsidian (probable)

Volcanic glass; primarily SiO₂-rich rhyolitic composition

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Pumice (Pumice (Vitreous pyroclastic rock)) — igneous

Pumice

Pumice (Vitreous pyroclastic rock)

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Black obsidian (probable) (Volcanic glass; predominantly SiO₂) — igneous

Black obsidian (probable)

Volcanic glass; predominantly SiO₂

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Basalt (Basalt (Extrusive volcanic rock)) — igneous

Basalt

Basalt (Extrusive volcanic rock)

Snowflake Obsidian (Volcanic Glass (spherulitic obsidian)) — igneous

Snowflake Obsidian

Volcanic Glass (spherulitic obsidian)

Mahogany Obsidian (Volcanic Glass with Hematite or Magnetite inclusions (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite or Magnetite inclusions (SiO2 + Fe2O3)

Obsidian (Volcanic Glass (Mainly SiO2)) — igneous

Obsidian

Volcanic Glass (Mainly SiO2)

Black Obsidian (Volcanic glass (Amorphous silicates)) — igneous

Black Obsidian

Volcanic glass (Amorphous silicates)

Obsidian Arrowhead (Obsidian (Volcanic Glass)) — igneous

Obsidian Arrowhead

Obsidian (Volcanic Glass)

Obsidian (Obsidian (volcanic glass)) — igneous

Obsidian

Obsidian (volcanic glass)

Pumice (Pumice (Volcanic Glass)) — igneous

Pumice

Pumice (Volcanic Glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

Educational Geologic Collection (Mixed Mineral and Rock Collection (Various compositions)) — mineral

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Felsic Tuff (Pyroclastic volcanic rock (Tuff)) — igneous

Felsic Tuff

Pyroclastic volcanic rock (Tuff)

Snowflake Obsidian (Hydrated Volcanic Glass with Cristobalite inclusions) — igneous

Snowflake Obsidian

Hydrated Volcanic Glass with Cristobalite inclusions

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Pumice (Pumice (a highly vesicular extrusive volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular extrusive volcanic glass)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Snowflake obsidian (Volcanic glass (mostly silica-rich obsidian) with cristobalite spherulites) — igneous

Snowflake obsidian

Volcanic glass (mostly silica-rich obsidian) with cristobalite spherulites

Obsidian (Volcanic glass (high silica volcanic rock)) — igneous

Obsidian

Volcanic glass (high silica volcanic rock)

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

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Pumice (Pumiceous volcanic glass) — igneous

Pumice

Pumiceous volcanic glass

Pumice (Pumiceous volcanic glass) — igneous

Pumice

Pumiceous volcanic glass

Pumice (likely weathered/water-worn) (Vesicular volcanic glass) — igneous

Pumice (likely weathered/water-worn)

Vesicular volcanic glass

Red Tuff / Sandstone (Rhyolitic Tuff / Pyroclastic Volcanic Rock) — igneous

Red Tuff / Sandstone

Rhyolitic Tuff / Pyroclastic Volcanic Rock