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 (Basalt) — igneous

Basalt pebble

Basalt

Basalt (Water-worn pebble) (Basalt (Aphanitic mafic volcanic rock)) — igneous

Basalt (Water-worn pebble)

Basalt (Aphanitic mafic volcanic rock)

Clear Quartz (Faceted) (Silicon Dioxide (SiO2)) — gemstone

Clear Quartz (Faceted)

Silicon Dioxide (SiO2)

Cullet Glass (Slag Glass) (Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities) — mineraloid

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Granodiorite (Granodiorite (containing Plagioclase, Quartz, Orthoclase, Biotic/Hornblende)) — igneous

Granodiorite

Granodiorite (containing Plagioclase, Quartz, Orthoclase, Biotic/Hornblende)

Peridotite (Peridotite (primarily Olivine and Pyroxene)) — igneous

Peridotite

Peridotite (primarily Olivine and Pyroxene)

Jasper Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper Pebble

Microcrystalline Quartz (SiO2)

Basalt with Peridotite Inclusion (Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith) — igneous

Basalt with Peridotite Inclusion

Mafic Volcanic Rock (Extrusive Igneous) with Ultramafic Xenolith

Amygdaloidal Basalt with Zeolite/Quartz Infill (Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)) — igneous

Amygdaloidal Basalt with Zeolite/Quartz Infill

Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)

Dalmatian jasper (Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions) — igneous

Dalmatian jasper

Orbicular microcrystalline quartz rock, commonly rhyolitic or volcanic-feldspar matrix with black arfvedsonite/alkali-amphibole inclusions

Porphyritic Basalt (Basalt with Feldspar Phenocrysts) — igneous

Porphyritic Basalt

Basalt with Feldspar Phenocrysts

Spinifex Textured Komatiite (Ultramafic Komatiite) — igneous

Spinifex Textured Komatiite

Ultramafic Komatiite

Amygdaloidal Basalt (Amygdaloidal Basalt (with secondary mineral infilling)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (with secondary mineral infilling)

Porphyry (Porphyritic Rhyolite or Andesite) — igneous

Porphyry

Porphyritic Rhyolite or Andesite

Basalt with Quartz Vein (Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) intrusion) — igneous

Basalt with Quartz Vein

Aphanitic Mafic Igneous Rock with Silicon Dioxide (SiO2) intrusion

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

Basalt (Weathered River Stone) (Basalt (SiO2 concentration approx. 45-52%)) — igneous

Basalt (Weathered River Stone)

Basalt (SiO2 concentration approx. 45-52%)

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

Basalt (Fieldstone) (Basalt) — igneous

Basalt (Fieldstone)

Basalt

Amygdaloidal basalt (vesicular basalt) (Basalt, commonly containing amygdales of quartz, chalcedony, calcite, or zeolites) — igneous

Amygdaloidal basalt (vesicular basalt)

Basalt, commonly containing amygdales of quartz, chalcedony, calcite, or zeolites

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Scoria (Red Lava Rock) (Scoria) — igneous

Scoria (Red Lava Rock)

Scoria

Quartz (Druzy on Matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Vesicular Basalt (or Scoraceous Basalt) (Basalt with vesicular texture) — igneous

Vesicular Basalt (or Scoraceous Basalt)

Basalt with vesicular texture

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

Scoria (Vesicular Basalt)

Scoria (Vesicular Igneous Rock)

Basalt (Extrusive Mafic Igneous Rock) — igneous

Basalt

Extrusive Mafic Igneous Rock

Red Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Diorite (Spotted) (Plutonic Igneous Rock (Diorite)) — igneous

Diorite (Spotted)

Plutonic Igneous Rock (Diorite)

Diorite (with Iron Staining) (Phaneritic Intermediate Igneous Rock) — igneous

Diorite (with Iron Staining)

Phaneritic Intermediate Igneous Rock

Jasper (Chalcedony (Microcrystalline Quartz) - SiO2) — sedimentary or metamorphic

Jasper

Chalcedony (Microcrystalline Quartz) - SiO2

sedimentary or metamorphic

Granite pebble (Granite, chiefly quartz, feldspar, and mica) — igneous

Granite pebble

Granite, chiefly quartz, feldspar, and mica

Diorite (Diorite) — igneous

Diorite

Diorite

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

Basalt

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Diabase (Dolerite) (Mafic intrusive igneous rock) — igneous

Diabase (Dolerite)

Mafic intrusive igneous rock

Basalt with Quartz Veining (Basalt (Mafic Volcanic Rock with SiO2)) — igneous

Basalt with Quartz Veining

Basalt (Mafic Volcanic Rock with SiO2)

Dalmatian Jasper (Peralkaline Quartz-Feldspar Igneous Rock) — igneous

Dalmatian Jasper

Peralkaline Quartz-Feldspar Igneous Rock

Peridotite (Peridotite (Ultramafic Rock)) — igneous

Peridotite

Peridotite (Ultramafic Rock)

Dalmatian Jasper (Peralkaline Quartz Feldspar Porphyry) — igneous

Dalmatian Jasper

Peralkaline Quartz Feldspar Porphyry

Basalt (with possible Olivine inclusions) (Mafic Igneous Rock (primarily Plagioclase and Pyroxene)) — igneous

Basalt (with possible Olivine inclusions)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Basalt (Basalt (primarily Plagioclase feldspar and Pyroxene)) — igneous

Basalt

Basalt (primarily Plagioclase feldspar and Pyroxene)