Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Granodiorite or Diorite (Granodiorite / Diorite) — igneous

Granodiorite or Diorite

Granodiorite / Diorite

Meteorite (Chondrite) (L6 Ordinary Chondrite) — igneous

Meteorite (Chondrite)

L6 Ordinary Chondrite

Graphic Granite (Graphic Granite (Quartz/Feldspar intergrowth)) — igneous

Graphic Granite

Graphic Granite (Quartz/Feldspar intergrowth)

Basalt with Vesicles (Aphanitic Mafic Volcanic Rock (Basalt)) — igneous

Basalt with Vesicles

Aphanitic Mafic Volcanic Rock (Basalt)

Granite Cobble (Granitoid (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Mica minerals)) — igneous

Granite Cobble

Granitoid (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Mica minerals)

Basalt with Quartz/Epidote Vein (Mafic volcanic rock (formula primarily (Mg, Fe)2SiO4 and CaAl2Si2O8)) — igneous

Basalt with Quartz/Epidote Vein

Mafic volcanic rock (formula primarily (Mg, Fe)2SiO4 and CaAl2Si2O8)

Tektite (Indochinite) (Tektite (Amorphous Silica Glass)) — igneous

Tektite (Indochinite)

Tektite (Amorphous Silica Glass)

Granitic Pegmatite (Pegmatitic Granite) — igneous

Granitic Pegmatite

Pegmatitic Granite

Snowflake Obsidian (Vitreous Volcanic Glass (Siliceous Obsidian with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Vitreous Volcanic Glass (Siliceous Obsidian with Cristobalite inclusions)

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

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Basalt (Porphyritic) (Porphyritic Mafic Extrusive (Basalt)) — igneous

Basalt (Porphyritic)

Porphyritic Mafic Extrusive (Basalt)

Granite (Granite (Felsic Plutonic Rock)) — Igneous

Granite

Granite (Felsic Plutonic Rock)

Mahogany Obsidian (Volcanic glass containing Magnetite/Hematite) — igneous

Mahogany Obsidian

Volcanic glass containing Magnetite/Hematite

Granite (Light-colored quartz/feldspar variety) (Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)) — igneous

Granite (Light-colored quartz/feldspar variety)

Granite (composed primarily of Quartz SiO2 and Feldspar KAlSi3O8)

Obsidian (Obsidian (Amorphous volcanic glass)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass)

Granitic Pegmatite with Schorl (Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — igneous

Granitic Pegmatite with Schorl

Granitic Pegmatite (NaAlSi3O8, KAlSi3O8, SiO2) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Basalt with Peridotite (Olivine) Xenolith (Olivine-rich Peridotite (Dunite) xenolith in Vesicular Basalt; chemical formula (Mg,Fe)2SiO4) — igneous

Basalt with Peridotite (Olivine) Xenolith

Olivine-rich Peridotite (Dunite) xenolith in Vesicular Basalt; chemical formula (Mg,Fe)2SiO4

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)) — Igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)

Yooperlite (Sodalite-rich Syenite) (Sodalite-bearing Syenite) — igneous

Yooperlite (Sodalite-rich Syenite)

Sodalite-bearing Syenite

Porphyritic Basalt (with Quartz or Calcite inclusion) (Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)) — igneous

Porphyritic Basalt (with Quartz or Calcite inclusion)

Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)

Granite (White Granite variant) (Phaneritic Plutonic Rock (High-silica Felsic)) — igneous

Granite (White Granite variant)

Phaneritic Plutonic Rock (High-silica Felsic)

Granite (Granite) — Igneous

Granite

Granite

Basalt (Mafic Volcanic Rock (Primarily Plagioclase feldspar and Pyroxene)) — Igneous

Basalt

Mafic Volcanic Rock (Primarily Plagioclase feldspar and Pyroxene)

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

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions (SiO2)

Golden Sheen Obsidian (Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen) — igneous

Golden Sheen Obsidian

Obsidian (volcanic glass) with inclusions of gas bubbles and mineral crystals (e.g., hematite, magnetite) causing the sheen

Granite (Granite (High-silica plutonic rock)) — Igneous

Granite

Granite (High-silica plutonic rock)

Basalt (Basalt) — igneous

Basalt

Basalt

Diorite (Salt and Pepper Rock) (Diorite) — igneous

Diorite (Salt and Pepper Rock)

Diorite

Tektite (Indochinite) (Tektite (High-silica natural glass, primarily SiO2 with Al2O3)) — igneous

Tektite (Indochinite)

Tektite (High-silica natural glass, primarily SiO2 with Al2O3)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Basalt (Mafic volcanic rock (primarily plagioclase, pyroxene, and olivine)) — Igneous

Basalt

Mafic volcanic rock (primarily plagioclase, pyroxene, and olivine)

Obsidian (Volcanic glass (SiO2 - Silicon Dioxide with impurities)) — igneous

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide with impurities)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Olivine in Basalt (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt) — igneous

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt

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

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Amazonite (Amazonite / Microcline (KAlSi3O8)) — igneous

Amazonite

Amazonite / Microcline (KAlSi3O8)

Obsidian (Obsidian (principally SiO2 + MgO, Fe3O4)) — igneous

Obsidian

Obsidian (principally SiO2 + MgO, Fe3O4)

Vesicular Basalt (commonly mistaken for Slag) (Scoriaceous Basalt (composed primarily of Plagioclase Feldspar and Pyroxene)) — igneous

Vesicular Basalt (commonly mistaken for Slag)

Scoriaceous Basalt (composed primarily of Plagioclase Feldspar and Pyroxene)

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Rhyolitic Tuff (Rhyolitic Tuff / Pyroclastic rock) — igneous

Rhyolitic Tuff

Rhyolitic Tuff / Pyroclastic rock

Scoria (Extrusive Basaltic Scoria) — igneous

Scoria

Extrusive Basaltic Scoria

Spinifex Textured Komatiite (Komatiite (Mg-rich ultramafic volcanic rock)) — igneous

Spinifex Textured Komatiite

Komatiite (Mg-rich ultramafic volcanic rock)