Rock Identifier

Category

Igneous Or Sedimentary (Anthropogenic Modification)

Browse igneous or sedimentary (anthropogenic modification) specimens identified by the Rock Identifier community.

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Vesicular Basalt (or Scoria) (Vesicular Basalt (Aphanitic-vesicular volcanic rock)) — igneous

Vesicular Basalt (or Scoria)

Vesicular Basalt (Aphanitic-vesicular volcanic rock)

Basalt (River Pebble) (Basalt (Aphanitic Mafic Volcanic Rock)) — Igneous

Basalt (River Pebble)

Basalt (Aphanitic Mafic Volcanic Rock)

Kimberlite (Kimberlite (Potassic ultramafic volcanic rock)) — igneous

Kimberlite

Kimberlite (Potassic ultramafic volcanic rock)

Sodalite Syenite (popularly known as Yooperlite) (Sodalite-rich Syenite (composed of alkali feldspar and sodalite)) — Igneous

Sodalite Syenite (popularly known as Yooperlite)

Sodalite-rich Syenite (composed of alkali feldspar and sodalite)

Basalt (Mafic volcanic rock (Basalt)) — igneous

Basalt

Mafic volcanic rock (Basalt)

Apache Tears (Obsidian) (Hydrated Volcanic Glass (Amorphous SiO2 + H2O)) — igneous

Apache Tears (Obsidian)

Hydrated Volcanic Glass (Amorphous SiO2 + H2O)

Amygdaloidal Basalt (Basalt with secondary mineral infilling) — igneous

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Porphyritic Basalt (Chinese Writing Stone) (Porphyritic Basalt or Porphyritic Andesite) — igneous

Porphyritic Basalt (Chinese Writing Stone)

Porphyritic Basalt or Porphyritic Andesite

Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite

Basalt (Basalt) — igneous

Basalt

Basalt

Basalt River Stone (Basalt) — igneous

Basalt River Stone

Basalt

Basalt (Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)) — igneous

Basalt

Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)

Pumice (Pumice (a highly vesicular amorphous volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular amorphous volcanic glass)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Diorite (Spotted or Dalmatian Stone effect) (Diorite (Intermediate Plutonic Rock)) — igneous

Diorite (Spotted or Dalmatian Stone effect)

Diorite (Intermediate Plutonic Rock)

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

Obsidian

Volcanic Glass (SiO2 - Silicon Dioxide with impurities)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Mahogany Obsidian (Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)) — igneous

Mahogany Obsidian

Obsidian (Volcanic Glass) with Hematite or Magnetite inclusions, SiO2 (Silicon Dioxide)

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

Obsidian

Volcanic glass (SiO2 - Silicon Dioxide)

Rhyolitic Tuff (Breccia Type) (Rhyolitic Pyroclastic Rock (Mixed Silicates including Quartz, Feldspar, and Volcanic Glass)) — igneous

Rhyolitic Tuff (Breccia Type)

Rhyolitic Pyroclastic Rock (Mixed Silicates including Quartz, Feldspar, and Volcanic Glass)

Quartz Veined Basalt Pebble (Amygdaloidal Basalt with Quartz (SiO2) veining) — igneous

Quartz Veined Basalt Pebble

Amygdaloidal Basalt with Quartz (SiO2) veining

Granodiorite (Granodiorite (containing Plagioclase, Quartz, and K-feldspar)) — igneous

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and K-feldspar)

Obsidian (Volcanic Glass (SiO2 dominant)) — igneous

Obsidian

Volcanic Glass (SiO2 dominant)

Gold Ore (Auriferous Quartz and Sulfide Mineralization in Host Rock) — igneous

Gold Ore

Auriferous Quartz and Sulfide Mineralization in Host Rock

Diamond in Kimberlite (Diamond (C in Kimberlite)) — igneous

Diamond in Kimberlite

Diamond (C in Kimberlite)

Granite (Phaneritic Felsic Intrusive Rock (Granite)) — Igneous

Granite

Phaneritic Felsic Intrusive Rock (Granite)

Labradorite (Larvikite variety) (Feldspar (Plagioclase series), (Na,Ca)(Si,Al)4O8) — igneous

Labradorite (Larvikite variety)

Feldspar (Plagioclase series), (Na,Ca)(Si,Al)4O8

Wishing Stone (Basalt with Quartz Vein) (Basalt containing a microcrystalline quartz (SiO2) or calcite vein) — igneous

Wishing Stone (Basalt with Quartz Vein)

Basalt containing a microcrystalline quartz (SiO2) or calcite vein

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

Basalt River Cobble

Basalt (Aphanitic Mafic Volcanic Rock)

Pumice (Pumice (a vesicular volcanic glass)) — igneous

Pumice

Pumice (a vesicular volcanic glass)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Amygdaloidal Rhyolite (Rhyolite (felsic volcanic rock) with amygdules) — igneous

Amygdaloidal Rhyolite

Rhyolite (felsic volcanic rock) with amygdules

Diabase (Greenstone) (Diabase (Dolerite)) — igneous

Diabase (Greenstone)

Diabase (Dolerite)

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

Mahogany Obsidian

Volcanic glass (SiO2 + Fe2O3)

Scoria (Scoria (Vesicular Basalt)) — igneous

Scoria

Scoria (Vesicular Basalt)

Scoria (Lava Rock) (Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)) — igneous

Scoria (Lava Rock)

Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)

Porphyritic Andesite (Porphyritic intermediate volcanic rock (Andesite)) — Igneous

Porphyritic Andesite

Porphyritic intermediate volcanic rock (Andesite)

Obsidian (Obsidian (principally SiO2)) — igneous

Obsidian

Obsidian (principally SiO2)

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Basalt with Amygdules (Amygdaloidal Basalt) — igneous

Basalt with Amygdules

Amygdaloidal Basalt

Granite (Granite (Phaneritic Quartz-Feldspar intrusive rock)) — Igneous

Granite

Granite (Phaneritic Quartz-Feldspar intrusive rock)