Rock Identifier

Category

Organic Materia (Not A Rock Or Mineral)

Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.

Learn about Organic Materia (Not A Rock Or Mineral) in the encyclopedia

Rock Salt

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Emerald in Matrix

Emerald in Matrix

Aquamarine Matrix

Aquamarine Matrix

Sapropel

Halite

Black Shale

Bituminous Shale

Bituminous Shale

Quartz with Mica/Host Rock (Silicon Dioxide (SiO2) with Phyllosilicates) — mineral

Quartz with Mica/Host Rock

Silicon Dioxide (SiO2) with Phyllosilicates

Bauxite (Laterite) (Hydrated aluminum oxides (Al2O3·nH2O)) — sedimentary

Bauxite (Laterite)

Hydrated aluminum oxides (Al2O3·nH2O)

Asphalt Chunk (Asphalt concrete) — man-made composite

Asphalt Chunk

Asphalt concrete

man-made composite

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Amethyst (Silicon Dioxide (SiO2) with Iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Breccia (Breccia (Sedimentary Clastic Rock)) — sedimentary

Breccia

Breccia (Sedimentary Clastic Rock)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Fossil Shark Tooth (Elasmobranchii (Class) fossil - possibly Odontaspididae family) — fossil

Fossil Shark Tooth

Elasmobranchii (Class) fossil - possibly Odontaspididae family

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (variant Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variant Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Conglomerate (Conglomerate rock) — sedimentary

Conglomerate

Conglomerate rock

Weathered granite or granitic gneiss fragment (Granite, predominantly quartz, feldspar, and dark mica/amphibole) — igneous

Weathered granite or granitic gneiss fragment

Granite, predominantly quartz, feldspar, and dark mica/amphibole

Quartz Pebble (with Iron Staining) (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (with Iron Staining)

Crystalline Silicon Dioxide (SiO2)

Amethyst Quartz Druse (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst Quartz Druse

Silicon Dioxide (SiO2) with iron impurities

Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Metamorphic Rock)

Porphyry (Porphyritic Basalt / Andesite) (Porphyritic Igneous Rock) — igneous

Porphyry (Porphyritic Basalt / Andesite)

Porphyritic Igneous Rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Granite Pebble (Intrusive Igneous Rock) — igneous

Granite Pebble

Intrusive Igneous Rock

White Topaz (Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2) — mineral

White Topaz

Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2

Quartz in Matrix (Lepidolite or Quartzite) (Silicon Dioxide (SiO2) with host rock) — mineral

Quartz in Matrix (Lepidolite or Quartzite)

Silicon Dioxide (SiO2) with host rock

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Chert (or Chalcedony) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (or Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (Chalcedony/Common Opal) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Common Opal)

Microcrystalline Quartz (SiO2)

Porphyritic Andesite (Andesite (Intermediate Volcanic Rock)) — igneous

Porphyritic Andesite

Andesite (Intermediate Volcanic Rock)

Granite (Intrusive igneous felsic rock) — igneous

Granite

Intrusive igneous felsic rock

Quartzite with Iron Staining (Metamorphic Quartz Sandstone) — metamorphic

Quartzite with Iron Staining

Metamorphic Quartz Sandstone

Desert Rose (Barite Rose or Gypsum Rose) (Barium Sulfate (BaSO4) / Hydrated Calcium Sulfate (CaSO4·2H2O)) — mineral

Desert Rose (Barite Rose or Gypsum Rose)

Barium Sulfate (BaSO4) / Hydrated Calcium Sulfate (CaSO4·2H2O)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Carved Mottled Greenish-Yellow Crystal/Glass Object (Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.) — Man-made Object/Uncertain Mineral

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Man-made Object/Uncertain Mineral

Quartz Pebble (Geode Fragment / Druzy Cavity) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Geode Fragment / Druzy Cavity)

Silicon Dioxide (SiO2)

Schist (Schist (metamorphic rock)) — metamorphic

Schist

Schist (metamorphic rock)

Emerald (or possibly Green Glass / Slag) (Beryl (Be3Al2(SiO3)6)) — gemstone

Emerald (or possibly Green Glass / Slag)

Beryl (Be3Al2(SiO3)6)

Quartz Druse on Basalt Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Druse on Basalt Matrix

Silicon Dioxide (SiO2)

Quartz Vein Rock with Feldspar (Silicon Dioxide (SiO2) with Potassium Feldspar) — mineral

Quartz Vein Rock with Feldspar

Silicon Dioxide (SiO2) with Potassium Feldspar