Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Learn about Igneous in the encyclopedia

Sölvsbergite

Sölvsbergite

Mint Obsidian

Mint Obsidian

Minette

Minette

Yellow-Green Obsidian

Yellow-Green Obsidian

Bostonite

Bostonite

Yellow Obsidian

Yellow Obsidian

Tinguaite

Tinguaite

Wonderstone

Wonderstone

Wehrite

Wehrite

Watermelon Obsidian

Watermelon Obsidian

Websterite

Websterite

Variolite

Variolite

Porphyritic Basalt (Porphyritic Basalt with Olivine phenocrysts) — igneous

Porphyritic Basalt

Porphyritic Basalt with Olivine phenocrysts

Chinese Writing Stone (Porphyritic Basalt or Andesite with Feldspar phenocrysts (likely Orthoclase or Plagioclase)) — igneous

Chinese Writing Stone

Porphyritic Basalt or Andesite with Feldspar phenocrysts (likely Orthoclase or Plagioclase)

Diorite (Diorite) — igneous

Diorite

Diorite

Vesicular Basalt (Lava Rock) (Vesicular Basalt) — igneous

Vesicular Basalt (Lava Rock)

Vesicular Basalt

Obsidian (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian

Volcanic Glass (70% or more SiO2)

Snowflake Obsidian (Volcanic Glass with Spherulite Inclusions (primarily SiO2)) — igneous

Snowflake Obsidian

Volcanic Glass with Spherulite Inclusions (primarily SiO2)

River Cobble (Basaltic/Andesitic) (Mafic to Intermediate Volcanic Rock) — igneous

River Cobble (Basaltic/Andesitic)

Mafic to Intermediate Volcanic Rock

Amygdaloidal Basalt (Basalt with secondary mineral infilling) — igneous

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Porphyritic Amygdaloidal Basalt (Amygdaloidal Porphyritic Basalt (Mafic volcanic rock)) — igneous

Porphyritic Amygdaloidal Basalt

Amygdaloidal Porphyritic Basalt (Mafic volcanic rock)

Granite (Granite) — igneous

Granite

Granite

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Granite Pebble (Granite (Phaneritic Quartz-Feldspar Plutonic Rock)) — igneous

Granite Pebble

Granite (Phaneritic Quartz-Feldspar Plutonic Rock)

Basalt (Mafic volcanic rock) — igneous

Basalt

Mafic volcanic rock

Granite Pebble (Granite (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granite (Felsic Plutonic Rock)

Obsidian (Volcanic Glass (SiO2 + impurities)) — igneous

Obsidian

Volcanic Glass (SiO2 + impurities)

Diorite (Diorite (Plagioclase feldspar and Hornblende/Biotite)) — igneous

Diorite

Diorite (Plagioclase feldspar and Hornblende/Biotite)

Granite (Phaneritic Plutonic Rock (Granite)) — igneous

Granite

Phaneritic Plutonic Rock (Granite)

Pink Granite (Phaneritic Plutonic Rock (Felsic)) — igneous

Pink Granite

Phaneritic Plutonic Rock (Felsic)

Graphic Granite (Pegmatite (Quartz and Alkali Feldspar intergrowth)) — igneous

Graphic Granite

Pegmatite (Quartz and Alkali Feldspar intergrowth)

Basalt (Basalt) — igneous

Basalt

Basalt

Porphyritic Andesite (Andesite with Hornblende phenocrysts) — igneous

Porphyritic Andesite

Andesite with Hornblende phenocrysts

Basalt with Plagioclase Phenocrysts (Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Basalt

Porphyry (Porphyritic Basalt or Andesite) — igneous

Porphyry

Porphyritic Basalt or Andesite

Granite (Phaneritic plutonic rock (SiO2-rich)) — igneous

Granite

Phaneritic plutonic rock (SiO2-rich)

Pegmatite with Black Tourmaline (Granitic Pegmatite with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)) — igneous

Pegmatite with Black Tourmaline

Granitic Pegmatite with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Amygdaloidal Basalt with Agate/Quartz Infill (Basalt with Secondary Silicate Mineralization (SiO2)) — igneous

Amygdaloidal Basalt with Agate/Quartz Infill

Basalt with Secondary Silicate Mineralization (SiO2)

Obsidian (Volcanic Glass (mostly SiO2)) — igneous

Obsidian

Volcanic Glass (mostly SiO2)

Diorite with Weathering Rind (Course-grained intermediate plutonic rock (Diorite)) — igneous

Diorite with Weathering Rind

Course-grained intermediate plutonic rock (Diorite)

Basalt with Olivine Phenocrysts (Aphanitic Mafic Volcanic Rock (Basalt)) — igneous

Basalt with Olivine Phenocrysts

Aphanitic Mafic Volcanic Rock (Basalt)

Andesite (Andesite (Intermediate Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Volcanic Rock)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Porphyritic Basalt (Flower Stone) (Basalt with Feldspar phenocrysts) — igneous

Porphyritic Basalt (Flower Stone)

Basalt with Feldspar phenocrysts

Basalt Scoria (Aphanitic basaltic scoria) — igneous

Basalt Scoria

Aphanitic basaltic scoria

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

Yooperlite (Fluorescent Sodalite-bearing Syenite)

Sodalite-bearing Syenite

Slag (Industrial Glass/Glassy Rock) (Anthropogenic Vitreous Material) — igneous

Slag (Industrial Glass/Glassy Rock)

Anthropogenic Vitreous Material

Obsidian Jewelry Piece (Volcanic Glass (SiO2 + impurities)) — igneous

Obsidian Jewelry Piece

Volcanic Glass (SiO2 + impurities)

Beach Pebble (likely Basalt or Chert) (Volcanic Basalt / Microcrystalline Quartz) — igneous

Beach Pebble (likely Basalt or Chert)

Volcanic Basalt / Microcrystalline Quartz

Black Obsidian (Obsidian (Volcanic Glass)) — igneous

Black Obsidian

Obsidian (Volcanic Glass)

Porphyritic Basalt (Porphyritic Basalt (with Plagioclase phenocrysts)) — igneous

Porphyritic Basalt

Porphyritic Basalt (with Plagioclase phenocrysts)

Black Obsidian (Volcanic Glass (Silicon Dioxide with impurities)) — igneous

Black Obsidian

Volcanic Glass (Silicon Dioxide with impurities)

Granite Pebble (Granite (Felsic Plutonic Rock)) — igneous

Granite Pebble

Granite (Felsic Plutonic Rock)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)