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

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Polished black stone, likely black obsidian (Obsidian — volcanic glass, chiefly SiO₂) — igneous

Polished black stone, likely black obsidian

Obsidian — volcanic glass, chiefly SiO₂

Quartz (Milky/Rose Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Rose Quartz)

Silicon Dioxide (SiO2)

Basalt with Quartz Veining (Basalt (Mafic Volcanic Rock)) — igneous

Basalt with Quartz Veining

Basalt (Mafic Volcanic Rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Amygdaloidal Basalt (Amygdaloidal Basalt (Mafic Volcanic Rock)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Basalt (Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)) — Igneous

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Vesicular Basalt (Scoria) (Aphanitic Mafic Igneous Rock (Vesicular Basalt)) — igneous

Vesicular Basalt (Scoria)

Aphanitic Mafic Igneous Rock (Vesicular Basalt)

Basalt with Plagioclase Microphenocrysts (Amygdaloidal or Porphyritic Basalt) — igneous

Basalt with Plagioclase Microphenocrysts

Amygdaloidal or Porphyritic Basalt

Basalt Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt Pebble

Basalt (Mafic volcanic rock)

Basalt River Pebble (Basalt (Mafic Volcanic Rock)) — igneous

Basalt River Pebble

Basalt (Mafic Volcanic Rock)

Basalt River Pebble (with Quartz Vein) (Basalt (Mafic Volcanic Rock)) — igneous

Basalt River Pebble (with Quartz Vein)

Basalt (Mafic Volcanic Rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt River Pebble (Aphanitic Mafic Volcanic Rock) — igneous

Basalt River Pebble

Aphanitic Mafic Volcanic Rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Olivine (Peridotite) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Porphyritic Igneous Rock / Porphyry (Porphyry (Plagioclase/Quartz phenocrysts in a finer-grained groundmass)) — igneous

Porphyritic Igneous Rock / Porphyry

Porphyry (Plagioclase/Quartz phenocrysts in a finer-grained groundmass)

Obsidian (Volcanic glass (Mainly SiO2)) — igneous

Obsidian

Volcanic glass (Mainly SiO2)

Basalt (tumbled/water-worn) (Extrusive mafic igneous rock) — igneous

Basalt (tumbled/water-worn)

Extrusive mafic igneous rock

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Volcanic Tuff (Breccia) (Pyroclastic Tuffaceous Rock) — igneous

Volcanic Tuff (Breccia)

Pyroclastic Tuffaceous Rock

Basalt (Vesicular) (Extrusive igneous rock with vesicular texture) — igneous

Basalt (Vesicular)

Extrusive igneous rock with vesicular texture

Amygdaloidal Basalt (Amygdaloidal Basalt) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt

Rhyolite (Extrusive Felsic Igneous Rock) — igneous

Rhyolite

Extrusive Felsic Igneous Rock

Rhyolite (Extrusive Felsic Igneous Rock) — igneous

Rhyolite

Extrusive Felsic Igneous Rock

Basalt Puddle Stone (Basalt (Mafic volcanic rock)) — igneous

Basalt Puddle Stone

Basalt (Mafic volcanic rock)

Pumice (Pumice (Vesicular Rhyolite)) — igneous

Pumice

Pumice (Vesicular Rhyolite)

Basalt Pebble (Basalt (Mafic Volcanic Rock)) — igneous

Basalt Pebble

Basalt (Mafic Volcanic Rock)

Basalt with Vesicles (Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)) — igneous

Basalt with Vesicles

Vesicular Basalt (comprising Plagioclase Feldspar, Pyroxene, and Olivine)

Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite

Carnelian (Red Chalcedony) (SiO2 (Silicon Dioxide) with Iron Oxide impurities) — mineral

Carnelian (Red Chalcedony)

SiO2 (Silicon Dioxide) with Iron Oxide impurities

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

Pink Rhyolite

Rhyolite (High-silica volcanic rock)

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

Snowflake Obsidian

Spherulitic Obsidian (Volcanic Glass with Cristobalite)

Pumice (Pumicite (Amorphous glass with varying chemical composition, often rhyolitic)) — Igneous

Pumice

Pumicite (Amorphous glass with varying chemical composition, often rhyolitic)

Basalt with Quartz/Calcite Veining (Basalt (principally Plagioclase and Pyroxene)) — igneous

Basalt with Quartz/Calcite Veining

Basalt (principally Plagioclase and Pyroxene)

Dalmatian Jasper (Dalmatian Stone) (Perthitic Feldspar with Arfvedsonite/Riebeckite) — igneous

Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite/Riebeckite

Basalt Pebble (Mafic Igneous Rock (Basalt)) — igneous

Basalt Pebble

Mafic Igneous Rock (Basalt)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt Pebble

Basalt (Mafic volcanic rock)

Basalt Pebble (Aphanitic extrusive igneous rock) — igneous

Basalt Pebble

Aphanitic extrusive igneous rock

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)