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 Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Agate (Chalcedony (SiO2)) — sedimentary

Agate

Chalcedony (SiO2)

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

Basalt (River Rock)

Aphanitic Mafic Igneous Rock

Basalt River Pebble (Extrusive mafic igneous rock) — igneous

Basalt River Pebble

Extrusive mafic igneous rock

Vesicular Basalt (Basalt with vesicular texture) — igneous

Vesicular Basalt

Basalt with vesicular texture

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

Basalt Pebble

Basalt (Mafic Extrusive Igneous Rock)

Vesicular Basalt (Scoria) (Basalt with vesicular texture) — igneous

Vesicular Basalt (Scoria)

Basalt with vesicular texture

Pumice and Scoria (Vesicular Volcanic Ejecta (Rhyolite/Andesite/Basalt)) — igneous

Pumice and Scoria

Vesicular Volcanic Ejecta (Rhyolite/Andesite/Basalt)

Basalt (Weathered/River worn) (Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)) — igneous

Basalt (Weathered/River worn)

Mafic Volcanic Rock (Primarily Plagioclase Feldspar and Pyroxene)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt with Iron Oxidation (Lattice/Veined) (Mafic Volcanic Rock (principally Plagioclase and Pyroxene)) — igneous

Basalt with Iron Oxidation (Lattice/Veined)

Mafic Volcanic Rock (principally Plagioclase and Pyroxene)

Basalt Pebble (Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)Si2O6 and (Ca, Na)AlSi3O8) — igneous

Basalt Pebble

Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)Si2O6 and (Ca, Na)AlSi3O8

Peridotite (Peridotite (Ultramafic Rock)) — igneous

Peridotite

Peridotite (Ultramafic Rock)

Pumice (Pumice (Felsic volcanic rock)) — igneous

Pumice

Pumice (Felsic volcanic rock)

Scoria (Vesicular Basaltic Rock) — igneous

Scoria

Vesicular Basaltic Rock

Amygdaloidal Basalt with Epidote/Chlorite (Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))) — igneous

Amygdaloidal Basalt with Epidote/Chlorite

Basalt (containing (Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)))

Purple Lava Rock / Vesicular Basalt (Vesicular Basalt (Mafic Extrusive Igneous Rock)) — igneous

Purple Lava Rock / Vesicular Basalt

Vesicular Basalt (Mafic Extrusive Igneous Rock)

Scoria (Red Lava Rock) (Scoria) — igneous

Scoria (Red Lava Rock)

Scoria

Basalt (Extrusive igneous rock) — igneous

Basalt

Extrusive igneous rock

Porphyritic Basalt or Diabase (Porphyritic Igneous Rock) — igneous

Porphyritic Basalt or Diabase

Porphyritic Igneous Rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Porphyry (Porphyritic Igneous Rock) — igneous

Porphyry

Porphyritic Igneous Rock

Basalt (Weathered Pebble) (Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene) — igneous

Basalt (Weathered Pebble)

Extrusive mafic igneous rock; minerals primarily Plagioclase feldspar and Pyroxene

Basalt Pebble (Aphanitic Igneous Rock) — igneous

Basalt Pebble

Aphanitic Igneous Rock

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt (Mafic extrusive igneous rock) — igneous

Basalt

Mafic extrusive igneous rock

Flower Agate (Chalcedony (Silicon Dioxide) with Plume Inclusions, SiO2) — mineral

Flower Agate

Chalcedony (Silicon Dioxide) with Plume Inclusions, SiO2

Basalt (or similar Mafic Igneous Rock) (Basalt) — igneous

Basalt (or similar Mafic Igneous Rock)

Basalt

Yellow Chalcedony (likely Carnelian or Agate) (Silicon dioxide (SiO2)) — mineral

Yellow Chalcedony (likely Carnelian or Agate)

Silicon dioxide (SiO2)

Lava Rock with Fabric Impression (Scoria or Basalt with anthropogenic impressions) — igneous

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Polished basalt with a quartz vein (Basalt, cut by milky quartz (SiO₂)) — igneous

Polished basalt with a quartz vein

Basalt, cut by milky quartz (SiO₂)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — mineral / metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

mineral / metamorphic

Red Scoria (Volcanic Cinder) (Scoria (Extrusive Mafic Igneous Rock)) — igneous

Red Scoria (Volcanic Cinder)

Scoria (Extrusive Mafic Igneous Rock)

Porphyritic Basalt (Porphyry) (Porphyritic Basalt) — igneous

Porphyritic Basalt (Porphyry)

Porphyritic Basalt

Amygdaloidal Basalt with Quartz Veining (Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining) — igneous

Amygdaloidal Basalt with Quartz Veining

Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Vesicular Basalt (Amygdaloidal Basalt (Mafic extrusive volcanic rock)) — Igneous

Vesicular Basalt

Amygdaloidal Basalt (Mafic extrusive volcanic rock)

Dark igneous rock, likely basalt (Basalt; chiefly plagioclase feldspar, pyroxene, and possibly olivine) — igneous

Dark igneous rock, likely basalt

Basalt; chiefly plagioclase feldspar, pyroxene, and possibly olivine