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

Granodiorite (containing Biotite and Quartz) (Granodiorite (Plagioclase-rich phaneritic intrusive rock)) — igneous

Granodiorite (containing Biotite and Quartz)

Granodiorite (Plagioclase-rich phaneritic intrusive rock)

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Amethyst

Quartz (Silicon Dioxide) - SiO2 with Iron impurities

Quartz Pebble (with iron staining) (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble (with iron staining)

Quartz (Silicon Dioxide, SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Blue Lace Agate (Silicon Dioxide (SiO₂), a variety of Chalcedony) — mineral

Blue Lace Agate

Silicon Dioxide (SiO₂), a variety of Chalcedony

Quartz (Clear or Cloudy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear or Cloudy Quartz)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Greenstone (Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)) — metamorphic

Greenstone

Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Massive Quartz (Silicon dioxide (SiO2)) — mineral

Massive Quartz

Silicon dioxide (SiO2)

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

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Granite (Granite (Phaneritic Quartz-Feldspar Felsic Rock)) — igneous

Granite

Granite (Phaneritic Quartz-Feldspar Felsic Rock)

Amygdaloidal Basalt (Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)) — igneous

Amygdaloidal Basalt

Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Scoria (Basaltic) (Vesicular Basalt) — igneous

Scoria (Basaltic)

Vesicular Basalt

Lava Rock with Fabric Impression (Scoria or Basalt with anthropogenic impressions) — igneous

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Basalt with Epidote (Porphyry) (Basalt (with inclusions of Epidote/Feldspar)) — igneous

Basalt with Epidote (Porphyry)

Basalt (with inclusions of Epidote/Feldspar)

Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Muscovite Mica (Muscovite KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite KAl2(AlSi3O10)(OH)2

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

Biotite Mica

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

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Clear Quartz (Rock Crystal) (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Pumice (Pumice (Felsic volcanic rock)) — igneous

Pumice

Pumice (Felsic volcanic rock)

Quartz with Oxides (Silicon Dioxide (SiO2)) — mineral

Quartz with Oxides

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Pumice and Scoria (Vesicular Volcanic Ejecta (Rhyolite/Andesite/Basalt)) — igneous

Pumice and Scoria

Vesicular Volcanic Ejecta (Rhyolite/Andesite/Basalt)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Greenstone (Metabasalt (Greenstone Facies)) — metamorphic

Greenstone

Metabasalt (Greenstone Facies)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Amethyst (Amethyst (Silicon Dioxide - SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2)

River Stone (Chalcedony/Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

River Stone (Chalcedony/Jasper variety)

Microcrystalline Quartz (SiO2)

Greenstone (Greenschist (composed of actinolite, chlorite, and epidote)) — metamorphic

Greenstone

Greenschist (composed of actinolite, chlorite, and epidote)

Snowflake Obsidian (or similar porphyritic volcanic rock) (Obsidian with Spherulites (if glassy), or Porphyritic Rhyolite/Andesite (if crystalline groundmass)) — igneous

Snowflake Obsidian (or similar porphyritic volcanic rock)

Obsidian with Spherulites (if glassy), or Porphyritic Rhyolite/Andesite (if crystalline groundmass)

Yellow Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Granite (Felsic Plutonic Rock (Granite)) — igneous

Granite

Felsic Plutonic Rock (Granite)

Granodiorite (Granodiorite (Intermediate to Felsic Intrusive Rock)) — igneous

Granodiorite

Granodiorite (Intermediate to Felsic Intrusive Rock)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — Mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Moonstone (Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8) inclusions) — mineral

Moonstone

Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8) inclusions