Rock Identifier

Category

Sedimentary Rock (Specifically A Concretion Or Possibly A Geode)

Browse sedimentary rock (specifically a concretion or possibly a geode) specimens identified by the Rock Identifier community.

Sandstone (Weathered Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Weathered Cobble)

Clastic sedimentary rock (primarily SiO2)

Agate (Silicon Dioxide (SiO2) - Chalcedony variant) — mineral

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Vesicular Basalt (Scoria) (Basalt (Extrusive Igneous Rock)) — igneous

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Basalt (Extrusive Mafic Igneous Rock) — igneous

Basalt

Extrusive Mafic Igneous Rock

Quartzite (specifically an iron-stained or Carnelian-colored variety) (Silicon Dioxide (SiO2) with iron oxide inclusions) — metamorphic

Quartzite (specifically an iron-stained or Carnelian-colored variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

Red Sandstone (Sandstone (principally Quartz with Iron Oxide coating)) — sedimentary

Red Sandstone

Sandstone (principally Quartz with Iron Oxide coating)

Slag (Industrial Byproduct) (Artificial silicate/iron byproduct) — Mineral description (Anthropogenic material)

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Mineral description (Anthropogenic material)

Basalt (Basalt (Mafic Volcanic Rock)) — igneous

Basalt

Basalt (Mafic Volcanic Rock)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Sandstone (Sandstone (clastic sedimentary rock)) — Rock

Sandstone

Sandstone (clastic sedimentary rock)

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

Scoria (Lava Rock)

Mafic Volcanic Scoria

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

Granite

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

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Basalt (Basalt (composition of plagioclase feldspar and pyroxene)) — igneous

Basalt

Basalt (composition of plagioclase feldspar and pyroxene)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Basalt with Vesicles (Aphanitic Mafic Volcanic Rock (Basalt)) — igneous

Basalt with Vesicles

Aphanitic Mafic Volcanic Rock (Basalt)

Basalt (Mafic Igneous Basalt) — igneous

Basalt

Mafic Igneous Basalt

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

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

Pumice

Pumice (a highly vesicular volcanic glass)

Red Jasper (Silicon Dioxide (SiO2) with Hematite inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Quartz (Quartz (SiO2)) — Mineral

Quartz

Quartz (SiO2)

Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Granite (Granite) — igneous

Granite

Granite

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

Scoria (Lava Rock)

Extrusive Igneous Scoria (Vesicular Basalt)

Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Vesicular Basalt (Extrusive mafic igneous rock (primarily Plagioclase feldspar and Pyroxene)) — igneous

Vesicular Basalt

Extrusive mafic igneous rock (primarily Plagioclase feldspar and Pyroxene)

Bumblebee Jasper (Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)) — igneous

Bumblebee Jasper

Fossiliferous Volcanic Rock (composed of Calcium Carbonate, Manganese Oxides, and Arsenic Sulfides)

Agate (specifically Carnelian or Honey Agate) (Silicon Dioxide (SiO2)) — Mineral

Agate (specifically Carnelian or Honey Agate)

Silicon Dioxide (SiO2)

Pumice (Pumice (volcanic rock)) — Igneous

Pumice

Pumice (volcanic rock)

Basalt (Mafic Volcanic Rock (Primarily Plagioclase feldspar and Pyroxene)) — Igneous

Basalt

Mafic Volcanic Rock (Primarily Plagioclase feldspar and Pyroxene)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Porphyritic Basalt (Amygdaloidal Porphyritic Basalt) — igneous

Porphyritic Basalt

Amygdaloidal Porphyritic Basalt

Basalt with Quartz/Calcite Veins (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt with Quartz/Calcite Veins

Basalt (Aphanitic Mafic Igneous Rock)

River Cobble (likely Basalt) (Mafic Igneous Rock (Aphanitic)) — Igneous

River Cobble (likely Basalt)

Mafic Igneous Rock (Aphanitic)

Amber (Succinite (specifically for Baltic Amber), Formula: C10H16O) — Mineraloid

Amber

Succinite (specifically for Baltic Amber), Formula: C10H16O

Vesicular Basalt with Secondary Mineral Infill (Mafic Volcanic Rock (Basalt)) — igneous

Vesicular Basalt with Secondary Mineral Infill

Mafic Volcanic Rock (Basalt)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Rhyolite (Rhyolite (Extrusive Igneous Rock)) — igneous

Rhyolite

Rhyolite (Extrusive Igneous Rock)

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

Basalt

Basalt (primarily composed of Plagioclase feldspar and Pyroxene)

Basalt (Vesicular) (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt (Vesicular)

Basalt (Mafic Extrusive Igneous Rock)

Basalt (Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)) — igneous

Basalt

Mafic volcanic rock (Primary minerals: Plagioclase feldspar, Pyroxene)