Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Basalt with Calcite Veins (Basalt (Mafic Volcanic Rock)) — igneous

Basalt with Calcite Veins

Basalt (Mafic Volcanic Rock)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

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

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica)

Greenstone Porphyry (Porphyritic Metavolcanic Rock) — igneous

Greenstone Porphyry

Porphyritic Metavolcanic Rock

Amygdaloidal Basalt (Basalt with Secondary Mineral Infillings) — igneous

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings

Obsidian / Chert (Arrowhead Artifact) (Obsidian (volcanic glass, SiO2 with impurities)) — igneous

Obsidian / Chert (Arrowhead Artifact)

Obsidian (volcanic glass, SiO2 with impurities)

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

Granite

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

Granite (Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Iron Meteorite (Campo del Cielo) (Iron Meteorite, Group IAB (FeNi Alloy: Kamacite and Taenite)) — igneous

Iron Meteorite (Campo del Cielo)

Iron Meteorite, Group IAB (FeNi Alloy: Kamacite and Taenite)

Scoria (Volcanic Rock) (Scoria (often basaltic scoria)) — Igneous

Scoria (Volcanic Rock)

Scoria (often basaltic scoria)

Mahogany Obsidian (Volcanic Glass (predominantly SiO2 with Hematite/Magnetite inclusions)) — igneous

Mahogany Obsidian

Volcanic Glass (predominantly SiO2 with Hematite/Magnetite inclusions)

Basalt (Basalt) — igneous

Basalt

Basalt

Pumice (Vesicular volcanic glass (primarily SiO2)) — igneous

Pumice

Vesicular volcanic glass (primarily SiO2)

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide)) — Igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide)

Scoria (Vesicular Basalt / Scoria) — igneous

Scoria

Vesicular Basalt / Scoria

Slag (Industrial Glass) (Anthropogenic Vitreous Slag (Post-industrial byproduct)) — igneous

Slag (Industrial Glass)

Anthropogenic Vitreous Slag (Post-industrial byproduct)

Obsidian Arrowhead (Volcanic Glass (70% or more SiO2)) — Igneous

Obsidian Arrowhead

Volcanic Glass (70% or more SiO2)

Basalt (Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)) — igneous

Basalt

Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

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

Obsidian

Obsidian (Volcanic Glass, SiO2)

Porphyritic Basalt (River Rock) (Porphyritic Basalt) — igneous

Porphyritic Basalt (River Rock)

Porphyritic Basalt

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Glacial Cobble (likely Granitic or Gneissic) (Granite/Gneiss Glacial Erratic) — igneous

Glacial Cobble (likely Granitic or Gneissic)

Granite/Gneiss Glacial Erratic

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

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Porphyritic Basalt (Basalt with plagioclase phenocrysts) — igneous

Porphyritic Basalt

Basalt with plagioclase phenocrysts

Lepidolite in Quartz (or Lepidolite Ore) (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Quartz (SiO2)) — igneous

Lepidolite in Quartz (or Lepidolite Ore)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Quartz (SiO2)

Basalt (Vesicular/Scoria) (Vesicular Basalt) — igneous

Basalt (Vesicular/Scoria)

Vesicular Basalt

Brown Antique Granite (Anorthosite (Technically a plutonic rock composed mainly of plagioclase feldspar)) — igneous

Brown Antique Granite

Anorthosite (Technically a plutonic rock composed mainly of plagioclase feldspar)

Basalt with Garnet inclusions (Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)) — igneous

Basalt with Garnet inclusions

Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)

Porphyritic Rhyolite (Red) (Rhyolite (Porphyry)) — igneous

Porphyritic Rhyolite (Red)

Rhyolite (Porphyry)

Scoria (Vesicular Basaltic Andesite/Scoria) — igneous

Scoria

Vesicular Basaltic Andesite/Scoria

Obsidian (Apache Tear) (Amorphous Volcanic Glass (SiO2 + impurities)) — igneous

Obsidian (Apache Tear)

Amorphous Volcanic Glass (SiO2 + impurities)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Chondrite Meteorite (Ordinary Chondrite (S-type asteroid origin)) — igneous

Chondrite Meteorite

Ordinary Chondrite (S-type asteroid origin)

Basalt (Basalt) — igneous

Basalt

Basalt

Bumble Bee Jasper (Volcanic Tuff (mixture of SiO2, CaCo3, S, and As2S3)) — igneous

Bumble Bee Jasper

Volcanic Tuff (mixture of SiO2, CaCo3, S, and As2S3)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Porphyritic Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Porphyritic Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Obsidian (Volcanic glass (primary composition: SiO2)) — igneous

Obsidian

Volcanic glass (primary composition: SiO2)

Granodiorite Pebble (Granodiorite) — igneous

Granodiorite Pebble

Granodiorite

Pumice (Pumice (Vesicular Rhyolite/Andesite)) — igneous

Pumice

Pumice (Vesicular Rhyolite/Andesite)

Vesicular Basalt (or Porphyritic Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (or Porphyritic Scoria)

Vesicular Basalt

Basalt (Basalt) — igneous

Basalt

Basalt