Rock Identifier

Category

Organic (Non Rock)

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

Learn about Organic (Non Rock) in the encyclopedia

Mudstone

Bituminous Shale

Bituminous Shale

Hornfels

Black Shale

Oil Shale

Argillite

Sapropel

Picture Jasper (Impure variety of silica (SiO2)) — sedimentary

Picture Jasper

Impure variety of silica (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Basalt (River or Beach Pebble) (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt (River or Beach Pebble)

Basalt (Mafic Extrusive Igneous Rock)

Quartzite (Metamorphic Quartz-rich Rock) — metamorphic

Quartzite

Metamorphic Quartz-rich Rock

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Quartzite (Metamorphic rock composed primarily of quartz (SiO2)) — metamorphic

Quartzite

Metamorphic rock composed primarily of quartz (SiO2)

Anthracite Coal (Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Petrified Wood (Silicified Wood (Silicon Dioxide - SiO2)) — fossil

Petrified Wood

Silicified Wood (Silicon Dioxide - SiO2)

Agatized Petrified Wood (Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood) — metamorphic

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Fossilized Bone (Petrified Bone (Fluorapatite / Calcium Phosphate replacement)) — fossil

Fossilized Bone

Petrified Bone (Fluorapatite / Calcium Phosphate replacement)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Moldavite (Tektite (Silicates with aluminum, iron, manganese, and potassium oxide glass)) — meteorite

Moldavite

Tektite (Silicates with aluminum, iron, manganese, and potassium oxide glass)

Chert Concretion (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Concretion

Microcrystalline Quartz (SiO2)

N/A (Non-Geological Object) — N/A

N/A (Non-Geological Object)

Chert (Smooth River Pebble) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Glauconite (Greensand) ((K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂) — sedimentary

Glauconite (Greensand)

(K, Na)(Fe3⁰, Al, Mg)₂(Si, Al)₄O₁₀(OH)₂

Chert (Jasper) (Microcrystalline Quartz (SiO2) with hematite impurities) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2) with hematite impurities

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Moss Agate Sphere (Silicon Dioxide (SiO2) with inclusions) — mineral

Moss Agate Sphere

Silicon Dioxide (SiO2) with inclusions

Chert (Flint variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Brachiopod Fossil in Limestone (Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)) — sedimentary

Brachiopod Fossil in Limestone

Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)

Chert (and Jasper blend) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (and Jasper blend)

Chert (Microcrystalline Quartz, SiO2)

Chert (with Quartz Vein) (Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)) — sedimentary

Chert (with Quartz Vein)

Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)

Chert (Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2)

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossiliferous Limestone (Coquina / Shell Limestone) (Biogenic Limestone (Calcium Carbonate, CaCO3)) — sedimentary

Fossiliferous Limestone (Coquina / Shell Limestone)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Grey Quartzite Pebble (Quartzite (primarily SiO2 - Silicon Dioxide)) — metamorphic

Grey Quartzite Pebble

Quartzite (primarily SiO2 - Silicon Dioxide)

Fossiliferous Limestone (Crinoid stem fragment) (Crinoidea (Phylum Echinodermata) in Calcite matrix) — fossil

Fossiliferous Limestone (Crinoid stem fragment)

Crinoidea (Phylum Echinodermata) in Calcite matrix

Chert Pebble (Chert (composed primarily of Microcrystalline Quartz, SiO2)) — sedimentary

Chert Pebble

Chert (composed primarily of Microcrystalline Quartz, SiO2)

Milky quartz (rough quartz specimen) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

Limonite-stained Chert (Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)) — sedimentary

Limonite-stained Chert

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)

Quartzite Pebble (Metamorphic Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (primarily SiO2)

Quartzite (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Common Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Common Opal

Hydrated amorphous silica (SiO2·nH2O)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Petrified Wood (Silicified wood / Permineralized wood (SiO2)) — fossil

Petrified Wood

Silicified wood / Permineralized wood (SiO2)