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 Volcanic Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Dark mafic igneous rock, likely basalt or gabbro (Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine and iron oxides) — igneous

Dark mafic igneous rock, likely basalt or gabbro

Basalt–gabbroic rock; chiefly plagioclase feldspar and pyroxene, possibly olivine and iron oxides

Dark mafic rock, likely basalt (Basalt (fine-grained assemblage chiefly plagioclase and pyroxene, commonly with olivine and iron oxides)) — igneous

Dark mafic rock, likely basalt

Basalt (fine-grained assemblage chiefly plagioclase and pyroxene, commonly with olivine and iron oxides)

Water-worn basalt cobble (Basalt; chiefly plagioclase feldspar, pyroxene, and minor olivine/iron oxides) — igneous

Water-worn basalt cobble

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

Polished basalt (likely vesicular basalt) (Basalt; predominantly plagioclase, clinopyroxene, and commonly olivine or iron-titanium oxides) — igneous

Polished basalt (likely vesicular basalt)

Basalt; predominantly plagioclase, clinopyroxene, and commonly olivine or iron-titanium oxides

Weathered basalt cobble (Basalt; fine-grained plagioclase–pyroxene rock, commonly with olivine and iron oxides) — igneous

Weathered basalt cobble

Basalt; fine-grained plagioclase–pyroxene rock, commonly with olivine and iron oxides

Tumbled black stone, likely basalt (Basalt; fine-grained plagioclase–pyroxene rock, possibly with magnetite) — igneous

Tumbled black stone, likely basalt

Basalt; fine-grained plagioclase–pyroxene rock, possibly with magnetite

Likely basaltic rock fragment (Fine-grained mafic igneous rock, probably basalt (plagioclase–pyroxene ± olivine)) — igneous

Likely basaltic rock fragment

Fine-grained mafic igneous rock, probably basalt (plagioclase–pyroxene ± olivine)

Likely weathered basalt or basaltic rock (Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine) — igneous

Likely weathered basalt or basaltic rock

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine

Rounded gray river pebble, likely basalt or andesite (Fine-grained mafic volcanic rock; commonly basalt (plagioclase, pyroxene, ± olivine)) — igneous

Rounded gray river pebble, likely basalt or andesite

Fine-grained mafic volcanic rock; commonly basalt (plagioclase, pyroxene, ± olivine)

Porphyritic Basalt (Porphyritic Basalt) — igneous

Porphyritic Basalt

Porphyritic Basalt

Basalt (Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)) — igneous

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Vesicular Rhyolite with inclusions (Felsic extrusive igneous rock (Rhyolite)) — igneous

Vesicular Rhyolite with inclusions

Felsic extrusive igneous rock (Rhyolite)

Porphyritic Basalt (Aphanitic-porphyritic mafic volcanic rock) — igneous

Porphyritic Basalt

Aphanitic-porphyritic mafic volcanic rock

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

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

Vesicular Basalt (Lava Rock)

Aphanitic Mafic Igneous Rock

Basalt (River Stone) (Extrusive mafic igneous rock) — igneous

Basalt (River Stone)

Extrusive mafic igneous rock

Basalt (Greenstone) (Extrusive mafic igneous rock) — igneous

Basalt (Greenstone)

Extrusive mafic igneous rock

Basalt (River Pebble) (Extrusive mafic igneous rock) — igneous

Basalt (River Pebble)

Extrusive mafic igneous rock

Basalt with Epidote Veins (Mafic Igneous Rock (Basalt)) — igneous

Basalt with Epidote Veins

Mafic Igneous Rock (Basalt)

Quartz Crystal Cluster on Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster on Matrix

Silicon Dioxide (SiO2)

Basalt (Afanitic Mafic Basalt) — igneous

Basalt

Afanitic Mafic Basalt

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Snowflake Obsidian (Volcanic glass with Phenocrysts (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass with Phenocrysts (SiO2)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Dalmatian Stone (Dalmatian Jasper (actually a Peralkaline Igneous Rock)) — igneous

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

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

Weathered Basalt

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt (Extrusive Igneous Basalt) — igneous

Basalt

Extrusive Igneous Basalt

Basalt River Cobble (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Granodiorite (Phaneritic-textured Intrusive Granodiorite) — igneous

Granodiorite

Phaneritic-textured Intrusive Granodiorite

Basalt with Vesicular/Amygdaloidal Alteration (Extrusive Igneous Rock (Mafic)) — igneous

Basalt with Vesicular/Amygdaloidal Alteration

Extrusive Igneous Rock (Mafic)

Porphyritic Basalt or Porphyritic Andesite (Porphyritic Extrusive Igneous Rock) — igneous

Porphyritic Basalt or Porphyritic Andesite

Porphyritic Extrusive Igneous Rock

Basalt Pebble (Extrusive mafic igneous rock) — igneous

Basalt Pebble

Extrusive mafic igneous rock

River Pebble (Basalt or Graywacke) (Mafic Igneous Rock (Basalt)) — igneous

River Pebble (Basalt or Graywacke)

Mafic Igneous Rock (Basalt)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Basalt (Basalt (Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Extrusive Igneous Rock)

Granite Cobble (Felsic Intrusive Igneous Rock) — igneous

Granite Cobble

Felsic Intrusive Igneous Rock

Basalt (Basalt (Mafic igneous rock)) — igneous

Basalt

Basalt (Mafic igneous rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Diorite (Phaneritic Intermediate Igneous Rock) — igneous

Diorite

Phaneritic Intermediate Igneous Rock

Diorite (Phaneritic intermediate plutonic rock) — igneous

Diorite

Phaneritic intermediate plutonic rock