Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Diorite (Diorite (Intermediate Plutonic Rock)) — igneous

Diorite

Diorite (Intermediate Plutonic Rock)

Granodiorite (Phaneritic Plutonic Rock - Granodiorite) — igneous

Granodiorite

Phaneritic Plutonic Rock - Granodiorite

Diabase (Diabase (also known as Dolerite)) — igneous

Diabase

Diabase (also known as Dolerite)

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

Porphyritic Basalt

Porphyritic Basalt (with plagioclase phenocrysts)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Iron Meteorite (likely Chondrite or weathered Iron-Nickel) (Meteorite (Fe-Ni alloy & silicates)) — igneous

Iron Meteorite (likely Chondrite or weathered Iron-Nickel)

Meteorite (Fe-Ni alloy & silicates)

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

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Basalt (Basalt) — igneous

Basalt

Basalt

Pumice (Pumicite (fine-grained pumice), Scoria (similar origin but denser and darker, usually basaltic)) — Igneous

Pumice

Pumicite (fine-grained pumice), Scoria (similar origin but denser and darker, usually basaltic)

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

Diorite (Salt and Pepper Rock)

Diorite

Basalt with Vesicular Texture (Basalt (SiO2 range 45-52%)) — igneous

Basalt with Vesicular Texture

Basalt (SiO2 range 45-52%)

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

Granite

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

Granite Cobble (Phaneritic Plutonic Felsic Rock) — igneous

Granite Cobble

Phaneritic Plutonic Felsic Rock

Basalt River Cobble (Vitreous aphanitic Basalt) — igneous

Basalt River Cobble

Vitreous aphanitic Basalt

Porphyritic Rhyolite (Red Porphyry) (Porphyritic Rhyolite (Felsic volcanic rock)) — igneous

Porphyritic Rhyolite (Red Porphyry)

Porphyritic Rhyolite (Felsic volcanic rock)

Obsidian (Obsidian (Amorphous volcanic glass, SiO2 rich)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass, SiO2 rich)

Pumice (Highly vesicular rhyolite/dacite (Amorphous glass)) — igneous

Pumice

Highly vesicular rhyolite/dacite (Amorphous glass)

Basalt with Scoria and potential Olivine/Pyroxene inclusions (Vesicular Basalt) — igneous

Basalt with Scoria and potential Olivine/Pyroxene inclusions

Vesicular Basalt

Diabase (also known as Dolerite) (Diabase) — igneous

Diabase (also known as Dolerite)

Diabase

Dalmatian Stone (Peralkaline Quartz-Feldspar Rock with Arfvedsonite) — igneous

Dalmatian Stone

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt with Quartz/Zeolite Inclusions (Porphyritic Basalt (SiO2 with Aluminosilicates)) — igneous

Basalt with Quartz/Zeolite Inclusions

Porphyritic Basalt (SiO2 with Aluminosilicates)

Basalt Pebble (Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)Si2O6 and (Ca, Na)AlSi3O8) — igneous

Basalt Pebble

Extrusive mafic igneous rock; primarily (Ca, Na)(Mg, Fe, Al)Si2O6 and (Ca, Na)AlSi3O8

Snowflake Obsidian (Volcanic glass with Cristobalite inclusions (70–75% SiO2)) — igneous

Snowflake Obsidian

Volcanic glass with Cristobalite inclusions (70–75% SiO2)

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

Granite

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

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

Granite (Weathered)

Granite (Felsic Plutonic Rock)

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

Lava Rock (Scoria)

Scoria (Vesicular Basalt)

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Vesicular Basalt (Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (Scoria)

Vesicular Basalt

Quartz Vein in Host Rock (Quartz (SiO2) in Mafic or Sedimentary Matrix) — igneous

Quartz Vein in Host Rock

Quartz (SiO2) in Mafic or Sedimentary Matrix

Graphic Granite (Pegmatitic Quartz-Feldspar Granite) — igneous

Graphic Granite

Pegmatitic Quartz-Feldspar Granite

Granite (Granite (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase Feldspar)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Alkali Feldspar, and Plagioclase Feldspar)

Black Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide) with impurities) — igneous

Black Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide) with impurities

Porphyry (Flower Stone) (Porphyritic Basalt or Andesite) — igneous

Porphyry (Flower Stone)

Porphyritic Basalt or Andesite

Scoria (Lava Rock) (Vesicular Basalt / Scoria) — Igneous

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Scoria (Vesicular Basalt) (Vesicular Basalt) — igneous

Scoria (Vesicular Basalt)

Vesicular Basalt

Amygdaloidal Basalt (Amygdaloidal Basalt (Host rock) with Quartz or Calcite amygdules) — igneous

Amygdaloidal Basalt

Amygdaloidal Basalt (Host rock) with Quartz or Calcite amygdules

Pumice (Pumicite (Amorphous Volcanic Glass)) — igneous

Pumice

Pumicite (Amorphous Volcanic Glass)

Pumice (Pumice (a highly vesicular volcanic rock)) — igneous

Pumice

Pumice (a highly vesicular volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)