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 (Polished) (Extrusive mafic igneous rock) — igneous

Basalt (Polished)

Extrusive mafic igneous rock

Quartz (Druzy or Crystalline) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy or Crystalline)

Silicon Dioxide (SiO2)

Basalt (Polished pebble) (Basalt (Aphanitic mafic volcanic rock)) — igneous

Basalt (Polished pebble)

Basalt (Aphanitic mafic volcanic rock)

Pumice and Scoria (Vesicular Volcanic Rock (Pumice: Silicic / Scoria: Mafic)) — igneous

Pumice and Scoria

Vesicular Volcanic Rock (Pumice: Silicic / Scoria: Mafic)

Banded Agate (Onyx type) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Basalt (Extrusive igneous rock) — igneous

Basalt

Extrusive igneous rock

Polished rhyolite (likely porphyritic rhyolite) (Rhyolite, composed chiefly of quartz and alkali feldspar with minor plagioclase, biotite, and iron oxides) — igneous

Polished rhyolite (likely porphyritic rhyolite)

Rhyolite, composed chiefly of quartz and alkali feldspar with minor plagioclase, biotite, and iron oxides

Scoria (Lava Rock) (Scoria (Extrusive Igneous Rock)) — igneous

Scoria (Lava Rock)

Scoria (Extrusive Igneous Rock)

Agate (SiO2 (Chalcedony/Quartz)) — sedimentary

Agate

SiO2 (Chalcedony/Quartz)

Peridotite (Ultramafic igneous rock) — igneous

Peridotite

Ultramafic igneous rock

Amethyst (Amethyst (Silicon Dioxide, SiO2 + Fe)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 + Fe)

Amygdaloidal Basalt (Basalt (with filled vesicles/amygdules)) — igneous

Amygdaloidal Basalt

Basalt (with filled vesicles/amygdules)

Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

Amygdaloidal Basalt (Basalt with Secondary Mineral Infillings) — igneous

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings

Vesicular Basalt (Extrusive Basaltic Scoria (CaAl2Si2O8 / (Mg,Fe)2SiO4)) — igneous

Vesicular Basalt

Extrusive Basaltic Scoria (CaAl2Si2O8 / (Mg,Fe)2SiO4)

Basalt Pebble (Shaped) (Extrusive Igneous Rock) — igneous

Basalt Pebble (Shaped)

Extrusive Igneous Rock

Basalt Pebble (Extrusive mafic igneous rock) — igneous

Basalt Pebble

Extrusive mafic igneous rock

Basalt (Mafic Igneous Rock) — igneous

Basalt

Mafic Igneous Rock

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Andesite (Andesite) — igneous

Andesite

Andesite

Basalt (Mafic Igneous Basalt) — igneous

Basalt

Mafic Igneous Basalt

Basalt Pebble (Extrusive Igneous Rock / Basalt) — igneous

Basalt Pebble

Extrusive Igneous Rock / Basalt

Basalt (Aphanitic Mafic Igneous Rock) — igneous

Basalt

Aphanitic Mafic Igneous Rock

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

Basalt Pebble

Mafic Igneous Rock (Basalt)

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

Basalt River Pebble

Basalt (Mafic volcanic rock)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Lava Rock Substrate (Scoria (Basaltic Rock)) — igneous

Lava Rock Substrate

Scoria (Basaltic Rock)

Scoria (Scoria (Vesicular Basaltic Glass)) — Igneous

Scoria

Scoria (Vesicular Basaltic Glass)

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

Vesicular Basalt (Scoria)

Mafic Igneous Volcanic Rock

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

Basalt (Beach Pebble)

Basalt (Aphanitic Mafic Igneous Rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

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

Basalt (River Worn)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Crushed Stone (Basalt/Gabbro) (Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Crushed Stone (Basalt/Gabbro)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Dalmatian Jasper (Dalmatian Stone (Aplite with Arfvedsonite)) — igneous

Dalmatian Jasper

Dalmatian Stone (Aplite with Arfvedsonite)

Obsidian (Obsidian (principally SiO2 + MgO, Fe3O4)) — igneous

Obsidian

Obsidian (principally SiO2 + MgO, Fe3O4)

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Basalt (Tumbled Massage Stone) (Extrusive Igneous Rock) — igneous

Basalt (Tumbled Massage Stone)

Extrusive Igneous Rock

Basalt (River Pebble) (Extrusive Magic Igneous Rock (Mainly Plagioclase and Pyroxene)) — igneous

Basalt (River Pebble)

Extrusive Magic Igneous Rock (Mainly Plagioclase and Pyroxene)