Rock Identifier

Category

Sedimentary (Volcanic)

Browse sedimentary (volcanic) specimens identified by the Rock Identifier community.

Apache Tear (Hydrated Obsidian (Volcanic Glass)) — Igneous

Apache Tear

Hydrated Obsidian (Volcanic Glass)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Concrete Aggregate) (Basalt (Mafic volcanic rock)) — igneous

Basalt (Concrete Aggregate)

Basalt (Mafic volcanic rock)

Andesite (Andesite (Intermediate Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Volcanic Rock)

Basalt (Basalt (Volcanic Mafic Rock)) — igneous

Basalt

Basalt (Volcanic Mafic Rock)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Chalcedony (Chalcedony (SiO2)) — mineral

Chalcedony

Chalcedony (SiO2)

Sandstone (Quartzite-rich Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Larimar (Pectolite (Sodium Calcium Silicate Hydroxide) - (NaCa2(Si3O8)(OH))) — Mineral

Larimar

Pectolite (Sodium Calcium Silicate Hydroxide) - (NaCa2(Si3O8)(OH))

Vesicular Basalt with Amygdules (Amygdaloidal Basalt) — igneous

Vesicular Basalt with Amygdules

Amygdaloidal Basalt

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Obsidian (Obsidian (Volcanic Glass, SiO2)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Basalt (Basalt (Igneous Volcanic Rock)) — igneous

Basalt

Basalt (Igneous Volcanic Rock)

Tumbled Obsidian (Volcanic Glass (Silicon Dioxide)) — igneous

Tumbled Obsidian

Volcanic Glass (Silicon Dioxide)

Vesicular Basalt or Scoria (Basalt (extrusive volcanic rock)) — igneous

Vesicular Basalt or Scoria

Basalt (extrusive volcanic rock)

Scoria (Lava Rock) (Scoria (Mafic Volcanic Rock)) — igneous

Scoria (Lava Rock)

Scoria (Mafic Volcanic Rock)

Obsidian (in jewelry setting) (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian (in jewelry setting)

Volcanic Glass (Amorphous Silica)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Mafic Volcanic Rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

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

Snowflake Obsidian

Volcanic Glass (SiO2 + impurities)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Obsidian (Volcanic Glass (SiO2 rich)) — igneous

Obsidian

Volcanic Glass (SiO2 rich)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Felsic Igneous Rock (likely Rhyolite or weathered Granite) (Felsic Volcanic/Plutonic Rock) — igneous

Felsic Igneous Rock (likely Rhyolite or weathered Granite)

Felsic Volcanic/Plutonic Rock

Obsidian (Volcanic Glass (SiO2 rich)) — igneous

Obsidian

Volcanic Glass (SiO2 rich)

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

Obsidian

Volcanic glass (SiO2 + impurities)

Obsidian (Volcanic glass (Mainly SiO2)) — igneous

Obsidian

Volcanic glass (Mainly SiO2)

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

Obsidian with Mahogany Phasing

Volcanic Glass (SiO2 + Fe2O3)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Pumice (Pumicite (Amorphous Volcanic Glass)) — igneous

Pumice

Pumicite (Amorphous Volcanic Glass)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Basalt (Vesicular and Scoria) (Basalt (extrusive volcanic rock)) — igneous

Basalt (Vesicular and Scoria)

Basalt (extrusive volcanic rock)