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

Asphalt Rock

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Black Obsidian

Obsidian

Pink Obsidian

Sideromelane

Carbonatite

Tachylite

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

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

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Pumice (Vesicular volcanic glass (primarily SiO2)) — igneous

Pumice

Vesicular volcanic glass (primarily SiO2)

Pumice (Pumice (Vitreous volcanic rock)) — igneous

Pumice

Pumice (Vitreous volcanic rock)

Obsidian Arrowhead (Obsidian (Volcanic Glass)) — igneous

Obsidian Arrowhead

Obsidian (Volcanic Glass)

Pumice (Volcanic Glass / Pumiceous Rhyolite) — igneous

Pumice

Volcanic Glass / Pumiceous Rhyolite

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

Pumice (Pumicite) — igneous

Pumice

Pumicite

Pumice (Pumice (Volcanic Glass)) — igneous

Pumice

Pumice (Volcanic Glass)

Obsidian (Obsidian (volcanic glass)) — igneous

Obsidian

Obsidian (volcanic glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

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

Pumice

Pumice (a vesicular volcanic glass)

Pumice (Pumice (a frothy volcanic glass)) — igneous

Pumice

Pumice (a frothy volcanic glass)

Pumice (Pumice (Volcanic Rock / Glass Foam)) — igneous

Pumice

Pumice (Volcanic Rock / Glass Foam)

Pumice (Pumice (volcanic glass rock)) — igneous

Pumice

Pumice (volcanic glass rock)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Pumice (Pumice (Volcanic Glass)) — igneous

Pumice

Pumice (Volcanic Glass)

Rhyolite (Rhyolite (felsic volcanic rock)) — igneous

Rhyolite

Rhyolite (felsic volcanic rock)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

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

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

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

Pumice

Pumice (Vesicular Rhyolite/Dacite)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

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

Obsidian

Volcanic glass (high silica volcanic rock)

Pumice (Pumice (SiO2)) — igneous

Pumice

Pumice (SiO2)

Rhyolite (Rhyolite (High-silica volcanic rock)) — igneous

Rhyolite

Rhyolite (High-silica volcanic rock)

Black Obsidian (Obsidian (Volcanic Glass)) — igneous

Black Obsidian

Obsidian (Volcanic Glass)

Pumice (Pumice (volcanic glass rock)) — igneous

Pumice

Pumice (volcanic glass rock)

Polished Basalt (Basalt (Mafic volcanic rock)) — Igneous

Polished Basalt

Basalt (Mafic volcanic rock)

Pumice (Volcanic Rock) (Vesicular volcanic rock (composed largely of amorphous volcanic glass)) — igneous

Pumice (Volcanic Rock)

Vesicular volcanic rock (composed largely of amorphous volcanic glass)

Pumice (specifically a water-worn, weathered variety) (Vesicular volcanic glass) — igneous

Pumice (specifically a water-worn, weathered variety)

Vesicular volcanic glass

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

Obsidian

Volcanic Glass (70-75% SiO2)

Pumice (Pumice (SiO2 + Al2O3 + Fe2O3)) — igneous

Pumice

Pumice (SiO2 + Al2O3 + Fe2O3)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Common Opal in Host Rock (Hydrated Silica (SiO2·nH2O)) — mineraloid

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Quartz Vein in Rhyolite (Silicon Dioxide (SiO2) in extrusive igneous rock) — igneous

Quartz Vein in Rhyolite

Silicon Dioxide (SiO2) in extrusive igneous rock

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

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

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Spherulitic Rhyolite / Leopard Skin Rhyolite (Extrusive felsic igneous rock with spherulites) — igneous

Spherulitic Rhyolite / Leopard Skin Rhyolite

Extrusive felsic igneous rock with spherulites