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 (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt

Basalt (Extrusive Mafic Igneous)

Basalt Pebble (Mafic extrusive igneous rock) — igneous

Basalt Pebble

Mafic extrusive igneous rock

Basalt Pebble (Extrusive mafic igneous rock) — igneous

Basalt Pebble

Extrusive mafic igneous rock

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

Basalt (Beach Pebble)

Extrusive mafic igneous rock

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Snowflake Obsidian (Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)

Black Obsidian (Volcanic Glass (felsic volcanic glass, rich in SiO2)) — igneous

Black Obsidian

Volcanic Glass (felsic volcanic glass, rich in SiO2)

Snowflake obsidian cabochon (Obsidian (volcanic glass), SiO₂-rich; white areas are cristobalite/spherulitic devitrification) — igneous

Snowflake obsidian cabochon

Obsidian (volcanic glass), SiO₂-rich; white areas are cristobalite/spherulitic devitrification

Leopard jasper (orbicular jasper) (Silicified volcanic rock, chiefly microcrystalline quartz/chalcedony (SiO₂) with feldspar and iron-oxide inclusions) — metamorphic

Leopard jasper (orbicular jasper)

Silicified volcanic rock, chiefly microcrystalline quartz/chalcedony (SiO₂) with feldspar and iron-oxide inclusions

Diorite (Diorite (Intrusive igneous rock)) — igneous

Diorite

Diorite (Intrusive igneous rock)

Porphyritic Basalt (Chinese Writing Stone) (Porphyritic Basalt with Feldspar phenocrysts) — igneous

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt with Feldspar phenocrysts

Porphyritic Granite pebble (or Porphyry) (Porphyritic Plutonic Igneous Rock (Granite / Monzonite porphyry)) — igneous

Porphyritic Granite pebble (or Porphyry)

Porphyritic Plutonic Igneous Rock (Granite / Monzonite porphyry)

Basalt with Olivine Phenocrysts (Porphyritic Basalt (with (Mg, Fe)2SiO4)) — igneous

Basalt with Olivine Phenocrysts

Porphyritic Basalt (with (Mg, Fe)2SiO4)

Basalt (Water-worn Pebble) (Basalt (Mafic volcanic rock)) — Igneous

Basalt (Water-worn Pebble)

Basalt (Mafic volcanic rock)

Basalt (with Porphyritic or Amygdaloidal features) (Mafic Volcanic Rock (Basalt)) — igneous

Basalt (with Porphyritic or Amygdaloidal features)

Mafic Volcanic Rock (Basalt)

Basalt (Basalt (mafic volcanic rock)) — igneous

Basalt

Basalt (mafic volcanic rock)

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

Vesicular Basalt (River Pebble)

Basalt (Mafic volcanic rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Gravel (likely Basalt or Greywacke) (Basalt (Mafic volcanic rock)) — igneous

Gravel (likely Basalt or Greywacke)

Basalt (Mafic volcanic rock)

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

Basalt Beach Pebble

Basalt (Mafic volcanic rock)

Basalt (with Brass Inlay) (Basalt (Mafic volcanic rock)) — igneous

Basalt (with Brass Inlay)

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

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

Basalt Pebble

Basalt (Mafic volcanic rock)

Vesicular Basalt (Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (Scoria)

Vesicular Basalt

Basalt (Mafic Igneous Rock (Basalt)) — igneous

Basalt

Mafic Igneous Rock (Basalt)

Dalmatian Jasper (Peralkaline Feldspar Diorite/Rhyolite) — igneous

Dalmatian Jasper

Peralkaline Feldspar Diorite/Rhyolite

Vesicular Basalt with Lichen (Vesicular Basalt) — igneous

Vesicular Basalt with Lichen

Vesicular Basalt

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

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

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

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Likely vesicular basalt (scoria) (Basaltic scoria; chiefly plagioclase, pyroxene, and olivine with vesicles) — igneous

Likely vesicular basalt (scoria)

Basaltic scoria; chiefly plagioclase, pyroxene, and olivine with vesicles

Chalcedony (Agate/Common Opal blend) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Common Opal blend)

Microcrystalline Quartz (SiO2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

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

Basalt River Stone

Basalt (Mafic volcanic rock)

Basalt Pebble (Extrusive Mafic Volcanic Rock) — igneous

Basalt Pebble

Extrusive Mafic Volcanic Rock

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

Basalt Pebble

Basalt (Mafic volcanic rock)

Basalt (Vesicular) (Basalt (Mafic volcanic rock)) — igneous

Basalt (Vesicular)

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt Pebble (Extrusive mafic igneous rock) — igneous

Basalt Pebble

Extrusive mafic igneous rock

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

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

Basalt River Cobble

Basalt (Mafic Igneous Rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock