Rock Identifier

Category

Organic (Non Rock)

Browse organic (non rock) specimens identified by the Rock Identifier community.

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

River Pebble (Quartzite/Siltstone mixture) (Silicon Dioxide (SiO2) mixture with varied clastic minerals) — sedimentary/metamorphic

River Pebble (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) mixture with varied clastic minerals

sedimentary/metamorphic

Quartzite with Quartz Veins (Quartzite (chiefly SiO2)) — metamorphic

Quartzite with Quartz Veins

Quartzite (chiefly SiO2)

Sandstone (Arenite (composed primarily of Quartz, SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of Quartz, SiO2)

Sandstone (likely Quartzose) (Arenite (SiO2 principal mineral)) — sedimentary

Sandstone (likely Quartzose)

Arenite (SiO2 principal mineral)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)

Quartzite (Quartzite (SiO2 prominent)) — metamorphic

Quartzite

Quartzite (SiO2 prominent)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Basalt (Basalt (principally composed of pyroxene and plagioclase feldspar)) — igneous

Basalt

Basalt (principally composed of pyroxene and plagioclase feldspar)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Quartzose type) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose type)

Arenite (primarily SiO2)

Basalt (Vesicular) (Vesicular Basalt) — Igneous

Basalt (Vesicular)

Vesicular Basalt

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

Basalt River Stone

Basalt (Aphanitic Mafic Volcanic Rock)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Garnet (Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3) — mineral

Garnet

Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3

Quartz Geode with Calcite (Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)) — Mineral/Geode

Quartz Geode with Calcite

Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)

Clear Quartz Crystal (Rock Crystal) (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Crystal (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Pyrope Garnet (Magnesium aluminum silicate (Mg3Al2Si3O12)) — mineral

Pyrope Garnet

Magnesium aluminum silicate (Mg3Al2Si3O12)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Thunderegg (Ate Agate/Jasper Geode) (Silicon Dioxide (SiO2) within Rhyolite/Perlite matrix) — sedimentary/igneous intermediary

Thunderegg (Ate Agate/Jasper Geode)

Silicon Dioxide (SiO2) within Rhyolite/Perlite matrix

sedimentary/igneous intermediary

Sandstone (lithic wacke) (Arenite / Lithic Wacke (mostly SiO2 with rock fragments)) — sedimentary

Sandstone (lithic wacke)

Arenite / Lithic Wacke (mostly SiO2 with rock fragments)

Sandstone (Water-worn Pebble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Water-worn Pebble)

Clastic sedimentary rock (primarily SiO2)

River Cobble (likely Quartzite) (Metamorphosed Sandstone (SiO2)) — metamorphic

River Cobble (likely Quartzite)

Metamorphosed Sandstone (SiO2)

Druzy Quartz on Chert/Chalcedony (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz on Chert/Chalcedony

Silicon Dioxide (SiO2)

Chert (Common Opal variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal variant)

Microcrystalline Quartz (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Vesicular Basalt (Scoria)

Aphanitic Mafic Igneous Rock (Vesicular Basalt)

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Red Quartzite Cobble (Quartzite (primarily SiO2)) — metamorphic

Red Quartzite Cobble

Quartzite (primarily SiO2)

Quartzite (Quartzite (predominantly SiO2)) — metamorphic

Quartzite

Quartzite (predominantly SiO2)

Basalt (Basalt) — igneous

Basalt

Basalt

Quartzite River Rock (Quartzite (Silicon Dioxide, SiO2)) — metamorphic

Quartzite River Rock

Quartzite (Silicon Dioxide, SiO2)

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt