Rock Identifier

Category

Sedimentary (Biogenic)

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

Learn about Sedimentary (Biogenic) in the encyclopedia

Conglomerate

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Breccia

Ironstone

Ironstone

Diatomite

Diatomite

Coal

Coal

Limestone

Limestone

Kambaba Jasper

Kambaba Jasper

Asphalt Rock

Asphalt Rock

Sapropel

Sapropel

Mudstone

Mudstone

Claystone

Claystone

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

Chert (Black Chert or Flint)

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily Quartz Arenite)) — sedimentary

Sandstone

Arenite (primarily Quartz Arenite)

Sandstone (Grooved/Weathered) (Arenite (composed primarily of Quartz and Lithic fragments)) — sedimentary

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

Red Jasper (Mahogany Obsidian variant similarity) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper (Mahogany Obsidian variant similarity)

Silicon Dioxide (SiO2) with iron oxide inclusions

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

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

Chert (Gray Chalcedony)

Microcrystalline Quartz (SiO2)

Fossilized Pycnodonte Oyster (Pycnodonte (Gryphaeostrea) species; Composition is Calcium Carbonate (Calcite/Aragonite)) — sedimentary

Fossilized Pycnodonte Oyster

Pycnodonte (Gryphaeostrea) species; Composition is Calcium Carbonate (Calcite/Aragonite)

Red Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Red Chert

Microcrystalline Quartz (SiO2)

Brown Jasper (Silicon Dioxide (SiO2)) — sedimentary

Brown Jasper

Silicon Dioxide (SiO2)

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

Chert (variations include Flint/Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint Pebbles)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (also known as Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (also known as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper/Chalcedony)

Microcrystalline Quartz (SiO2)

Chert nodules (Microcrystalline Quartz (SiO2)) — sedimentary

Chert nodules

Microcrystalline Quartz (SiO2)

Hematite (Iron (III) Oxide (Fe2O3)) — mineral

Hematite

Iron (III) Oxide (Fe2O3)

Botryoidal Chalcedony (Agate) (Silicon Dioxide (SiO2)) — sedimentary

Botryoidal Chalcedony (Agate)

Silicon Dioxide (SiO2)

Rainbow Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Rainbow Fluorite

Fluorite (Calcium Fluoride, CaF2)

Chert / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Chert / Chalcedony

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with iron oxide inclusions

Carnelian Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Quartz Pebble (Crystalline Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

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

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Hematoid Quartz (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — mineral

Hematoid Quartz

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Chalcedony (including Carnelian and Agate variants) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (including Carnelian and Agate variants)

Silicon Dioxide (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

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

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

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

Chert (Jasper)

Silicon Dioxide (SiO2)

Banded Agate (Silicon Dioxide (SiO2)) — sedimentary

Banded Agate

Silicon Dioxide (SiO2)

Banded Agate (Cryptocrystalline variety of Quartz (SiO2)) — sedimentary

Banded Agate

Cryptocrystalline variety of Quartz (SiO2)

Chalcedony (Agate/Chert) (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Chert)

Microcrystalline Quartz (SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Orange Calcite / Quartzite with Iron Staining (Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) with Iron Oxide impurities) — mineral

Orange Calcite / Quartzite with Iron Staining

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3) with Iron Oxide impurities

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Flint (Chert variant) (Silica (SiO2) - Microcrystalline Quartz) — sedimentary

Flint (Chert variant)

Silica (SiO2) - Microcrystalline Quartz

Chert (with Quartz Veining) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Quartz Veining)

Microcrystalline Quartz (SiO2)

Blue Apatite (Apatite, Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite, Ca5(PO4)3(F,Cl,OH)

Chert (Agatized) (Silicon dioxide (SiO2)) — sedimentary

Chert (Agatized)

Silicon dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)