Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Basalt (Mafic volcanic rock (Silicon dioxide 45-52%)) — igneous

Basalt

Mafic volcanic rock (Silicon dioxide 45-52%)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Pink Granite (Granite (rich in Potassium Feldspar/Orthoclase)) — igneous

Pink Granite

Granite (rich in Potassium Feldspar/Orthoclase)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Gold Sheen Obsidian (Obsidian (volcanic glass with SiO2 + gas inclusions)) — igneous

Gold Sheen Obsidian

Obsidian (volcanic glass with SiO2 + gas inclusions)

K2 Jasper (K2 Granite) (Azulite in Granite (Quartz + Feldspar + Biotite + Azurite)) — igneous

K2 Jasper (K2 Granite)

Azulite in Granite (Quartz + Feldspar + Biotite + Azurite)

Basalt with Quartz Veins (Vesicular or aphanitic Basalt with SiO2 (Quartz) intrusions) — Igneous

Basalt with Quartz Veins

Vesicular or aphanitic Basalt with SiO2 (Quartz) intrusions

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Mahogany Obsidian (Volcanic Glass (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass (SiO2 + Fe2O3)

Basalt (Basalt (primarily composed of Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Basalt (primarily composed of Plagioclase Feldspar and Pyroxene)

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

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Basalt (Basalt (composition of plagioclase, pyroxene, and olivine)) — igneous

Basalt

Basalt (composition of plagioclase, pyroxene, and olivine)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Porphyritic Basalt (Porphyritic Fine-grained Mafic Volcanic Rock) — igneous

Porphyritic Basalt

Porphyritic Fine-grained Mafic Volcanic Rock

Pumice (Pumice (volcanic glass froth)) — igneous

Pumice

Pumice (volcanic glass froth)

Apache Tear (Obsidian (Volcanic Glass), formula: 70–75% SiO2 plus MgO, Fe3O4) — igneous

Apache Tear

Obsidian (Volcanic Glass), formula: 70–75% SiO2 plus MgO, Fe3O4

Obsidian (Volcanic glass (high silica content, usually >70% SiO2)) — igneous

Obsidian

Volcanic glass (high silica content, usually >70% SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt (Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)) — igneous

Basalt

Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)

Basalt Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt Pebble

Basalt (Mafic volcanic rock)

Basalt (Basalt) — igneous

Basalt

Basalt

Granite (Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)) — igneous

Granite

Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)

Porphyritic Andesite (Andesite (Porphyry)) — igneous

Porphyritic Andesite

Andesite (Porphyry)

Snowflake Obsidian (Spherulitic Volcanic Glass (primarily SiO2)) — igneous

Snowflake Obsidian

Spherulitic Volcanic Glass (primarily SiO2)

Vesicular Basalt with Amygdules (Amygdaloidal Basalt) — igneous

Vesicular Basalt with Amygdules

Amygdaloidal Basalt

Granite (Granite) — igneous

Granite

Granite

Pink Granite (Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)) — igneous

Pink Granite

Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)

Granite (Granite (compositional mixture of Quartz, Feldspar, and Mica)) — igneous

Granite

Granite (compositional mixture of Quartz, Feldspar, and Mica)

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

Scoria (Lava Rock)

Vesicular Basalt / Scoria

Pegmatite (with smoky quartz and tourmaline/biotite) (Pegmatitic Granite) — igneous

Pegmatite (with smoky quartz and tourmaline/biotite)

Pegmatitic Granite

Pink Granite (Phaneritic Quartz-Feldspar Granite) — igneous

Pink Granite

Phaneritic Quartz-Feldspar Granite

Mahogany Obsidian Arrowhead (Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)) — igneous

Mahogany Obsidian Arrowhead

Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)

Basalt (Basalt (Mafic Extrusive)) — igneous

Basalt

Basalt (Mafic Extrusive)

Scoria (Vesicular Basalt / Scoria (Mafic volcanic rock)) — igneous

Scoria

Vesicular Basalt / Scoria (Mafic volcanic rock)

Porphyritic Basalt (Chinese Writing Stone or Flower Stone) (Porphyritic Basalt / Porphyry) — igneous

Porphyritic Basalt (Chinese Writing Stone or Flower Stone)

Porphyritic Basalt / Porphyry

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

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

Obsidian

Volcanic Glass (SiO2 + minor impurities)

Scoria (Lava Rock) (Scoria (extrusive volcanic rock)) — igneous

Scoria (Lava Rock)

Scoria (extrusive volcanic rock)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Bumblebee Jasper (Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)) — igneous

Bumblebee Jasper

Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)

Granite (Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))) — igneous

Granite

Granite (comprised primarily of Quartz (SiO2), Feldspar (KAlSi3O8), and Mica (KAl2(AlSi3O10)(OH)2))