Rock Identifier

Category

Igneous Rock

Browse igneous rock specimens identified by the Rock Identifier community.

Learn about Igneous Rock in the encyclopedia

Carbonatite

Carbonatite

Rock Gypsum

Rock Gypsum

Rock Salt

Rock Salt

Coral Rock

Coral Rock

Asphalt Rock

Asphalt Rock

Pyroxenite

Pyroxenite

Basalt

Basalt

Diorite

Diorite

Kimberlite

Kimberlite

Norite

Norite

Troctolite

Troctolite

Gabbro

Gabbro

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Pumice (Pumicite / Vesicular Rhyolite) — igneous

Pumice

Pumicite / Vesicular Rhyolite

Granite (Polished Pebble) (Phaneritic Plutonic Rock (primarily Orthoclase and Quartz)) — igneous

Granite (Polished Pebble)

Phaneritic Plutonic Rock (primarily Orthoclase and Quartz)

Pumice (or Volcanic Scoria) (Vesicular Rhyolite or Vesicular Basalt) — igneous

Pumice (or Volcanic Scoria)

Vesicular Rhyolite or Vesicular Basalt

Granite (Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))) — igneous

Granite

Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))

Gneiss (River Cobble) (Metamorphic Gneiss) — metamorphic

Gneiss (River Cobble)

Metamorphic Gneiss

Basalt (Basalt (composition mainly of Plagioclase feldspar, Pyroxene, and Olivine)) — igneous

Basalt

Basalt (composition mainly of Plagioclase feldspar, Pyroxene, and Olivine)

Amygdaloidal Basalt (Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Ca-rich Plagioclase, Pyroxene, and Olivine)

Olivine-rich Basalt with Peridotite Xenoliths (Porphyritic Basalt containing Dunite/Peridotite (Mg,Fe)2SiO4) — igneous

Olivine-rich Basalt with Peridotite Xenoliths

Porphyritic Basalt containing Dunite/Peridotite (Mg,Fe)2SiO4

Amygdaloidal Basalt with Quartz/Calcite Inclusions (Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)) — igneous

Amygdaloidal Basalt with Quartz/Calcite Inclusions

Amygdaloidal Basalt (SiO2 / CaCO3 inclusions)

Wishing Stone (Basalt with Quartz Vein) (Basalt containing a microcrystalline quartz (SiO2) or calcite vein) — igneous

Wishing Stone (Basalt with Quartz Vein)

Basalt containing a microcrystalline quartz (SiO2) or calcite vein

Granite (Phaneritic plutonic rock (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic plutonic rock (composed primarily of Quartz, Feldspar, and Mica)

Pumice (Pumicite (Volcanic glass with vesicular texture)) — igneous

Pumice

Pumicite (Volcanic glass with vesicular texture)

Polished Black Obsidian (Volcanic Glass (70-75% SiO2)) — igneous

Polished Black Obsidian

Volcanic Glass (70-75% SiO2)

Pumice (Pumiceous rhyolite) — igneous

Pumice

Pumiceous rhyolite

Granite (Phaneritic plutonic rock (mainly Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic plutonic rock (mainly Quartz, Feldspar, and Mica)

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

Diorite

Phaneritic intermediate plutonic rock (Diorite)

Kimberlite (Kimberlite (Potassic ultramafic volcanic rock)) — igneous

Kimberlite

Kimberlite (Potassic ultramafic volcanic rock)

Greenstone / Greenschist (Greenschist (metamorphosed mafic rock)) — metamorphic

Greenstone / Greenschist

Greenschist (metamorphosed mafic rock)

Kimberlite (Kimberlite) — igneous

Kimberlite

Kimberlite

Peridotite (with Olivine) (Peridotite (rich in Olivine, (Mg,Fe)2SiO4)) — igneous

Peridotite (with Olivine)

Peridotite (rich in Olivine, (Mg,Fe)2SiO4)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Vesicular Basalt (Extrusive Basaltic Scoria (CaAl2Si2O8 / (Mg,Fe)2SiO4)) — igneous

Vesicular Basalt

Extrusive Basaltic Scoria (CaAl2Si2O8 / (Mg,Fe)2SiO4)

Scoria (Scoriaceous Basalt) — igneous

Scoria

Scoriaceous Basalt

Scoria (Scoriaceous Basalt) — igneous

Scoria

Scoriaceous Basalt

Apache Tear (Obsidian) (Hydrated volcanic glass (SiO2 with inclusions)) — igneous

Apache Tear (Obsidian)

Hydrated volcanic glass (SiO2 with inclusions)

Vesicular Basalt (Iron-rich) (Scoriaceous Basalt / Oxidized Vesicular Basalt) — igneous

Vesicular Basalt (Iron-rich)

Scoriaceous Basalt / Oxidized Vesicular Basalt

Banded Rhyolite (likely Green Jasper/Agate variety) (Silicon Dioxide (SiO2) with mineral inclusions) — igneous

Banded Rhyolite (likely Green Jasper/Agate variety)

Silicon Dioxide (SiO2) with mineral inclusions

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

River Cobble (likely Basalt or Chert) (Basalt (Mafic volcanic rock)) — igneous

River Cobble (likely Basalt or Chert)

Basalt (Mafic volcanic rock)

Biotite (Black Mica) (Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2) — mineral

Biotite (Black Mica)

Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Granite (Granite) — igneous

Granite

Granite

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Granite River Pebble (Granite (composed of Quartz, Feldspar, and Mica)) — igneous

Granite River Pebble

Granite (composed of Quartz, Feldspar, and Mica)

Granite (Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Diabase (Greenstone) (Diabase (also known as Dolerite)) — igneous

Diabase (Greenstone)

Diabase (also known as Dolerite)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (Basalt) — igneous

Basalt

Basalt