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

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Basalt with Weathered Rind (Basalt (Extrusive Mafic Igneous Rock)) — igneous

Basalt with Weathered Rind

Basalt (Extrusive Mafic Igneous Rock)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz geode (Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity) — mineral

Quartz geode

Quartz (SiO₂), likely drusy/microcrystalline quartz lining a geode cavity

Basalt with Epidote (Porphyritic Basalt) (Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions) — igneous

Basalt with Epidote (Porphyritic Basalt)

Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions

Tumbled White Quartz (Silicon Dioxide (SiO2)) — mineral

Tumbled White Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz in Epidote Host Rock (Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)) — mineral

Milky Quartz in Epidote Host Rock

Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)

Basalt (with possible mineral veining) (Basalt (Aphanitic Mafic Igneous Rock)) — Igneous

Basalt (with possible mineral veining)

Basalt (Aphanitic Mafic Igneous Rock)

Wishing Stone (Basalt with Quartz Vein) (Basalt with Hydrothermal Quartz Infill (SiO2)) — igneous

Wishing Stone (Basalt with Quartz Vein)

Basalt with Hydrothermal Quartz Infill (SiO2)

Basalt with Feldspar phenocrysts (Aphanitic to Porphyritic Mafic Volcanic Rock) — igneous

Basalt with Feldspar phenocrysts

Aphanitic to Porphyritic Mafic Volcanic Rock

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

Basalt River Stone

Basalt (extrusive mafic rock)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

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

Basalt

Basalt (primarily Plagioclase feldspar and Pyroxene)

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

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

Red Scoria (Lava Rock)

Scoria (Basaltic Scoria)

Quartz in Matrix (possibly with Biotite or Hornblende) (Quartz (Silicon Dioxide, SiO2) in Granitic Matrix) — igneous

Quartz in Matrix (possibly with Biotite or Hornblende)

Quartz (Silicon Dioxide, SiO2) in Granitic Matrix

Vesicular Basalt with Xenocrysts (Mafic Igneous Plutonic/Extrusive Complex) — igneous

Vesicular Basalt with Xenocrysts

Mafic Igneous Plutonic/Extrusive Complex

Porphyritic Basalt (Amygdaloidal Porphyritic Basalt) — Igneous

Porphyritic Basalt

Amygdaloidal Porphyritic Basalt

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

Diorite

Diorite (Intermediate intrusive igneous rock)

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

Diorite

Diorite (Intermediate intrusive igneous rock)

Agate (Crazy Lace or Eye Agate) (Silicon Dioxide (SiO2)) — mineral

Agate (Crazy Lace or Eye Agate)

Silicon Dioxide (SiO2)

Chert (Agatized/Chalcedony variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Agatized/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Peridotite (Peridotite (composed largely of Olivine (Mg,Fe)2SiO4)) — igneous

Peridotite

Peridotite (composed largely of Olivine (Mg,Fe)2SiO4)

Scoria (Lava Rock) (Scoria) — igneous

Scoria (Lava Rock)

Scoria

Blue Lace Agate (Chalcedony (SiO2)) — mineral

Blue Lace Agate

Chalcedony (SiO2)

Scoria (Lava Rock) (Scoria (highly vesicular volcanic rock)) — igneous

Scoria (Lava Rock)

Scoria (highly vesicular volcanic rock)

Rhyolite (Rhyolite (felsic extrusive igneous rock)) — igneous

Rhyolite

Rhyolite (felsic extrusive igneous rock)

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.) (Mixed Silicates and Sulfides (SiO2, FeS2)) — mineral

Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)

Mixed Silicates and Sulfides (SiO2, FeS2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Basalt (Vesicular) (Basalt) — igneous

Basalt (Vesicular)

Basalt

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Diorite (or Gabbro/Gneiss stream pebble) (Diorite) — igneous

Diorite (or Gabbro/Gneiss stream pebble)

Diorite

Basalt (Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)) — igneous

Basalt

Mafic Igneous Rock (composed primarily of plagioclase feldspar and pyroxene)

Vesicular Basalt with Calcification (Vesicular Basalt (Aphanitic extrusive igneous rock)) — igneous

Vesicular Basalt with Calcification

Vesicular Basalt (Aphanitic extrusive igneous rock)

Scoria (Extrusive igneous basaltic rock) — igneous

Scoria

Extrusive igneous basaltic rock

Basalt (Extrusive Aphanitic Mafic Rock) — igneous

Basalt

Extrusive Aphanitic Mafic Rock

Diorite (Diorite (intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (intermediate intrusive igneous rock)