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 (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

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

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

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

Vesicular Basalt

Extrusive mafic igneous rock (Basalt with vesicular texture)

Tumbled Agate (Silicon Dioxide (Chalcedony variety), SiO2) — gemstone

Tumbled Agate

Silicon Dioxide (Chalcedony variety), SiO2

Basalt (Basalt) — igneous

Basalt

Basalt

Pumice (Pumice (Volcanic Rock)) — igneous

Pumice

Pumice (Volcanic Rock)

Basalt (with Vesicles) (Mafic Volcanic Rock) — igneous

Basalt (with Vesicles)

Mafic Volcanic Rock

Basalt (Mafic volcanic rock) — igneous

Basalt

Mafic volcanic rock

Basalt (Mafic Volcanic Rock) — igneous

Basalt

Mafic Volcanic Rock

Basalt (Mafic volcanic rock) — igneous

Basalt

Mafic volcanic rock

Pumice (Pumice (volcanic rock)) — Igneous

Pumice

Pumice (volcanic rock)

Basalt (Mafic volcanic rock) — igneous

Basalt

Mafic volcanic rock

Vesicular Basalt (Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)) — igneous

Vesicular Basalt

Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

Tumbled dark stone, likely basalt (Basalt; chiefly plagioclase feldspar, pyroxene, and minor olivine or iron oxides) — igneous

Tumbled dark stone, likely basalt

Basalt; chiefly plagioclase feldspar, pyroxene, and minor olivine or iron oxides

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

Basalt River Stone (Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Basalt River Stone

Aphanitic Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Porphyritic Rhyolite (Birdseye Rhyolite) (Rhyolite (Porphyritic texture)) — igneous

Porphyritic Rhyolite (Birdseye Rhyolite)

Rhyolite (Porphyritic texture)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Basalt) — igneous

Basalt

Basalt

Porphyritic Basalt or Diabase (Mafic igneous rock with porphyritic texture) — igneous

Porphyritic Basalt or Diabase

Mafic igneous rock with porphyritic texture

Scoria (Lava Rock) (Scoria (Mafic volcanic rock)) — igneous

Scoria (Lava Rock)

Scoria (Mafic volcanic rock)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Porphyry (Porphyritic igneous rock) — igneous

Porphyry

Porphyritic igneous rock

Vesicular Basalt (Extrusive Igneous Rock) — igneous

Vesicular Basalt

Extrusive Igneous Rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Porphyry (Porphyritic Igneous Rock) — igneous

Porphyry

Porphyritic Igneous Rock

Peridotite Nodules in Basalt (Xenolith) (Ultramafic Xenolith (Olivine-rich Peridotite in Basalt)) — igneous

Peridotite Nodules in Basalt (Xenolith)

Ultramafic Xenolith (Olivine-rich Peridotite in Basalt)

Diorite (Intermediate plutonic igneous rock) — igneous

Diorite

Intermediate plutonic igneous rock

Basalt (Extrusive igneous rock) — igneous

Basalt

Extrusive igneous rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

River Pebble (Basalt or fine-grained Quartzite) (Fine-grained Mafic Rock (Volcanic Basalt)) — igneous

River Pebble (Basalt or fine-grained Quartzite)

Fine-grained Mafic Rock (Volcanic Basalt)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Basalt (Basalt (Aphanitic-fine grained mafic igneous rock)) — igneous

Basalt

Basalt (Aphanitic-fine grained mafic igneous rock)

Basalt Pebble (Aphanitic Igneous Rock) — igneous

Basalt Pebble

Aphanitic Igneous Rock

Basalt River Pebble (Extrusive Mafic Basalt) — igneous

Basalt River Pebble

Extrusive Mafic Basalt

Granite-like igneous rock (Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate) — igneous

Granite-like igneous rock

Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate

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

Basalt Pebble

Basalt (Aphanitic Mafic Igneous Rock)

Scoria (Lava Rock) (Mafic Vesicular Volcanic Rock) — igneous

Scoria (Lava Rock)

Mafic Vesicular Volcanic Rock