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

Amethyst (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Tumbled dark igneous rock, likely basalt (Basalt; commonly composed of plagioclase feldspar, pyroxene, and olivine) — igneous

Tumbled dark igneous rock, likely basalt

Basalt; commonly composed of plagioclase feldspar, pyroxene, and olivine

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (Basalt) — igneous

Basalt

Basalt

Diorite (Diorite) — igneous

Diorite

Diorite

Basalt (Basalt) — igneous

Basalt

Basalt

Gneiss (Green Gneiss) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (Green Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — Igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Pumice (Pumice) — igneous

Pumice

Pumice

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (River Stone) (Afanitic Basalt (primarily Plagioclase Feldspar and Pyroxene)) — igneous

Basalt (River Stone)

Afanitic Basalt (primarily Plagioclase Feldspar and Pyroxene)

Basalt (River Stone) (Basalt) — igneous

Basalt (River Stone)

Basalt

Diorite with Quartz contact (Intermediate Phaneritic Igneous Rock (Diorite)) — igneous

Diorite with Quartz contact

Intermediate Phaneritic Igneous Rock (Diorite)

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)

Granite Pebble (Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)) — igneous

Granite Pebble

Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Quartz with impurities or Host Rock (SiO2 (Silicon Dioxide) with mixed silicates) — mineral

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Quartz (Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Quartz Druzy (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy

Silicon Dioxide (SiO2)

Lava Stone and Chakra Beads (Basalt (with various mineral/synthetic beads)) — igneous

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions (SiO2)) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions (SiO2)

Reddish-brown granitic pebble (Granite, likely biotite granite or granodiorite) — igneous

Reddish-brown granitic pebble

Granite, likely biotite granite or granodiorite

Obsidian (Volcanic Glass (Amorphous Silica, SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica, SiO2)

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

Amygdaloidal Basalt (Extrusive mafic igneous rock with amygdules) — igneous

Amygdaloidal Basalt

Extrusive mafic igneous rock with amygdules

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Gabbro (Gabbro (Coarse-grained mafic intrusive igneous rock)) — igneous

Gabbro

Gabbro (Coarse-grained mafic intrusive igneous rock)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Basalt (Porphyritic) (Porphyritic Basalt) — igneous

Basalt (Porphyritic)

Porphyritic Basalt

Diorite (Phaneritic intermediate plutonic rock (Diorite)) — igneous

Diorite

Phaneritic intermediate plutonic rock (Diorite)

Granite (Weathered) (Phaneritic Felsic Igneous Rock) — Igneous

Granite (Weathered)

Phaneritic Felsic Igneous Rock

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Basalt (Basalt (Mafic Extrusive Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Rock)

Carnelian (Carnelian (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Carnelian

Carnelian (Cryptocrystalline variety of Quartz, SiO2)

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

Basalt with Quartz Veining

Basalt (Mafic Volcanic Rock) with Silicon Dioxide (SiO2) inclusions

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Ferruginous Quartz (Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)) — mineral

Ferruginous Quartz

Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)

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

Basalt (Polished)

Basalt (Mafic Extrusive Igneous Rock)

Diorite (Phaneritic intermediate plutonic rock) — igneous

Diorite

Phaneritic intermediate plutonic rock

Hypersthene (Hypersthene ((Mg,Fe)SiO₃)) — Mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)