Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Learn about Igneous in the encyclopedia

Albitite

Alnöite

Andesite

Anorthosite

Apache Tears

Banded Obsidian

Banded Obsidian

Basalt

Black Obsidian

Blue Pearl Granite

Blue Pearl Granite

Boninite

Bostonite

Brown Obsidian

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Red coral (coral beads) (Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)) — gemstone

Red coral (coral beads)

Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)

Clear quartz (rock crystal) (Quartz, crystalline silicon dioxide (SiO₂)) — mineral

Clear quartz (rock crystal)

Quartz, crystalline silicon dioxide (SiO₂)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

Granite River Rock (Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite River Rock

Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)

Granite Pebble (Intrusive Igneous Rock (Quartz, Feldspar, Mica)) — igneous

Granite Pebble

Intrusive Igneous Rock (Quartz, Feldspar, Mica)

Granite (Intrusive igneous rock (Felsic)) — igneous

Granite

Intrusive igneous rock (Felsic)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite with Pyrite or Mica (Phaneritic intrusive igneous rock) — igneous

Granite with Pyrite or Mica

Phaneritic intrusive igneous rock

Granite (Granite (Plutonic Igneous Rock)) — igneous

Granite

Granite (Plutonic Igneous Rock)

Dark, coarse-grained rock (possibly diorite or amphibolite) (Undetermined; likely a mafic to intermediate rock containing plagioclase and dark amphibole or pyroxene) — igneous

Dark, coarse-grained rock (possibly diorite or amphibolite)

Undetermined; likely a mafic to intermediate rock containing plagioclase and dark amphibole or pyroxene

Polished blue banded stone, likely sodalite or blue apatite (Probable sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue apatite, Ca₅(PO₄)₃(F,Cl,OH)) — mineral

Polished blue banded stone, likely sodalite or blue apatite

Probable sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue apatite, Ca₅(PO₄)₃(F,Cl,OH)

Magnetite / Ironstone (Magnetite (Fe3O4)) — mineral

Magnetite / Ironstone

Magnetite (Fe3O4)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Tumbled sodalite (Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂) — mineral

Tumbled sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Quartz (Milky/Rose Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Rose Quartz)

Silicon Dioxide (SiO2)

Likely tumbled hematite or magnetite (Hematite (Fe₂O₃) or magnetite (Fe₃O₄)) — mineral

Likely tumbled hematite or magnetite

Hematite (Fe₂O₃) or magnetite (Fe₃O₄)

Faceted gemstone ring, likely smoky quartz or garnet in a metal setting (Not determinable from the photograph; possible quartz (SiO₂) or garnet-group silicate) — gemstone

Faceted gemstone ring, likely smoky quartz or garnet in a metal setting

Not determinable from the photograph; possible quartz (SiO₂) or garnet-group silicate

Magnetite Ore (Magnetite (Fe3O4)) — mineral

Magnetite Ore

Magnetite (Fe3O4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Quartz Heart or Arrowhead Shape (Silicon Dioxide (SiO2)) — mineral

Quartz Heart or Arrowhead Shape

Silicon Dioxide (SiO2)

Feldspar (Plagioclase / Potassium Feldspar) (Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)) — mineral

Feldspar (Plagioclase / Potassium Feldspar)

Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)

Porphyry (Porphyritic igneous rock) — igneous

Porphyry

Porphyritic igneous rock

Blue sodalite-rich rock (likely sodalite syenite) (Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, in a sodalite-bearing igneous rock) — igneous

Blue sodalite-rich rock (likely sodalite syenite)

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂, in a sodalite-bearing igneous rock

Basalt (Extrusive Igneous Rock) — igneous

Basalt

Extrusive Igneous Rock

Basalt Pebble (Extrusive Igneous Rock) — igneous

Basalt Pebble

Extrusive Igneous Rock

Tumbled blue-gray stone, likely labradorite or sodalite (Possibly labradorite (plagioclase feldspar, approximately NaAlSi₃O₈–CaAl₂Si₂O₈) or sodalite (Na₈(Al₆Si₆O₂₄)Cl₂)) — mineral

Tumbled blue-gray stone, likely labradorite or sodalite

Possibly labradorite (plagioclase feldspar, approximately NaAlSi₃O₈–CaAl₂Si₂O₈) or sodalite (Na₈(Al₆Si₆O₂₄)Cl₂)

Magnetite / Ironstone (Iron(II,III) oxide (Fe3O4)) — mineral

Magnetite / Ironstone

Iron(II,III) oxide (Fe3O4)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Sodalite (Sodalite - Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite - Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)

Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Labradorite-bearing rough stone (tentative) (Labradorite, a calcium-rich plagioclase feldspar; possible mafic host rock) — mineral

Labradorite-bearing rough stone (tentative)

Labradorite, a calcium-rich plagioclase feldspar; possible mafic host rock

Tumbled quartz pebble (probable milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled quartz pebble (probable milky quartz)

Quartz, silicon dioxide (SiO₂)

Beaded gemstone bracelets, likely lavender jade/quartz and blue-gray sodalite or dumortierite (Probable jadeite/nephrite or lavender quartz; blue beads may be sodalite (Na8(Al6Si6O24)Cl2) or dumortierite) — mineral

Beaded gemstone bracelets, likely lavender jade/quartz and blue-gray sodalite or dumortierite

Probable jadeite/nephrite or lavender quartz; blue beads may be sodalite (Na8(Al6Si6O24)Cl2) or dumortierite

Polished labradorite pendant (Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)) — mineral

Polished labradorite pendant

Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Magnetite / Hematite mix (Iron Ore) (Fe3O4 (Magnetite) / Fe2O3 (Hematite)) — mineral

Magnetite / Hematite mix (Iron Ore)

Fe3O4 (Magnetite) / Fe2O3 (Hematite)