Rock Identifier

Category

Sedimentary (Fossilized Organic Remain)

Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.

Fossilized Bone Fragment (Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)) — sedimentary

Fossilized Bone Fragment

Permineralized Vertebrate Bone (Hydrox yapatite replaced by Silica or Calcite)

sedimentary
Calamites (Fossilized Horsetail) (Calamites suckowii (Family: Calamitaceae)) — sedimentary

Calamites (Fossilized Horsetail)

Calamites suckowii (Family: Calamitaceae)

sedimentary
Fossilized Crinoid Stem (Class Crinoidea (Echinodermata)) — sedimentary

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

sedimentary
Picture Jasper (Silicon Dioxide (SiO2) - Opaque Impure Chalcedony) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) - Opaque Impure Chalcedony

sedimentary
Fossil Rugose Coral (Horn Coral) (Order Rugosa (likely Grewingkia or Heliophyllum species); Calcium Carbonate (CaCO3)) — sedimentary

Fossil Rugose Coral (Horn Coral)

Order Rugosa (likely Grewingkia or Heliophyllum species); Calcium Carbonate (CaCO3)

sedimentary
Horn Coral Fossil (Rugosa (Order Rugosa)) — sedimentary

Horn Coral Fossil

Rugosa (Order Rugosa)

sedimentary
Goniatite Fossil (Goniatitida (Order), fossilized in limestone/calcite (CaCO3)) — sedimentary

Goniatite Fossil

Goniatitida (Order), fossilized in limestone/calcite (CaCO3)

sedimentary
Chondrite Meteorite (Ordinary Chondrite (S-type Asteroid fragment)) — mineral

Chondrite Meteorite

Ordinary Chondrite (S-type Asteroid fragment)

mineral
Fossilized Turritella Gastropod (Internal Mold) (Turritella (Fossil Gastropod Crust)) — sedimentary

Fossilized Turritella Gastropod (Internal Mold)

Turritella (Fossil Gastropod Crust)

sedimentary
Bivalve Fossil (Clam) (Class Bivalvia (Calcium Carbonate, CaCO3)) — sedimentary

Bivalve Fossil (Clam)

Class Bivalvia (Calcium Carbonate, CaCO3)

sedimentary
Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

mineral
Petoskey Stone (Fossilized Coral) (Hexagonaria percarinata (CaCO3)) — sedimentary

Petoskey Stone (Fossilized Coral)

Hexagonaria percarinata (CaCO3)

sedimentary
Mookaite Jasper (Mookaite (variety of Chert/Jasper), Silicon Dioxide - SiO2) — sedimentary

Mookaite Jasper

Mookaite (variety of Chert/Jasper), Silicon Dioxide - SiO2

sedimentary
Quartzite (River-worn Cobble) (Quartzite (composed primarily of SiO2)) — metamorphic

Quartzite (River-worn Cobble)

Quartzite (composed primarily of SiO2)

metamorphic
Lava Rock with Fabric Impression (Scoria or Basalt with anthropogenic impressions) — igneous

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

igneous
Fulgurite (Fulgurite (Lechatelierite-rich variety)) — metamorphic

Fulgurite

Fulgurite (Lechatelierite-rich variety)

metamorphic
Amethyst (Silicon Dioxide with Iron impurities (SiO2 + Fe3+)) — mineral

Amethyst

Silicon Dioxide with Iron impurities (SiO2 + Fe3+)

mineral
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Brachiopod Fossil (Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)) — sedimentary

Brachiopod Fossil

Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)

sedimentary
Fossilized Crinoid Stem Columnal (Phylum Echinodermata; Class Crinoidea (CaCO3)) — sedimentary

Fossilized Crinoid Stem Columnal

Phylum Echinodermata; Class Crinoidea (CaCO3)

sedimentary
Bivalve Shell (Fossil or Contemporary) (Class Bivalvie (various genera and species of clams, cockles, etc.)) — Sedimentary (Biogenic sediment or biological remain)

Bivalve Shell (Fossil or Contemporary)

Class Bivalvie (various genera and species of clams, cockles, etc.)

Sedimentary (Biogenic sediment or biological remain)
Mookaite Jasper (Radiolarite (Silica-rich sedimentary rock featuring Hematite and Goethite)) — sedimentary

Mookaite Jasper

Radiolarite (Silica-rich sedimentary rock featuring Hematite and Goethite)

sedimentary
Amber (Succinite (Fossilized Tree Resin)) — mineral

Amber

Succinite (Fossilized Tree Resin)

mineral
River Quartzite (River Stone) (Quartzite (primarily SiO2)) — metamorphic

River Quartzite (River Stone)

Quartzite (primarily SiO2)

metamorphic
Quartzite with Iron Staining (Silicon Dioxide (SiO2) with Fe2O3 impurities) — metamorphic

Quartzite with Iron Staining

Silicon Dioxide (SiO2) with Fe2O3 impurities

metamorphic
Limestone (specifically Bituminous or Carbonaceous Limestone) (Calcium Carbonate (CaCO3) with Organic Impurities) — sedimentary

Limestone (specifically Bituminous or Carbonaceous Limestone)

Calcium Carbonate (CaCO3) with Organic Impurities

sedimentary
Charoite (Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)) — mineral

Charoite

Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)

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

Quartzite Pebble

Quartzite (primarily SiO2)

metamorphic
Honeycomb Coral Fossil (Favosites (extinct genus of tabulate coral)) — sedimentary

Honeycomb Coral Fossil

Favosites (extinct genus of tabulate coral)

sedimentary
Brachiopod Fossil in Chert (Phylum Brachiopoda within Microcrystalline Quartz (SiO2)) — sedimentary

Brachiopod Fossil in Chert

Phylum Brachiopoda within Microcrystalline Quartz (SiO2)

sedimentary
Ammonite Fossil (Ammonoidea (subclass)) — sedimentary

Ammonite Fossil

Ammonoidea (subclass)

sedimentary
Dendritic Opal (Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)) — mineral

Dendritic Opal

Dendritic Common Opal (SiO2·nH2O with Manganese oxide inclusions)

mineral
Jasper (likely Kambaba or Crocodile Jasper variety) (Silicon Dioxide (SiO2) with inclusions) — sedimentary

Jasper (likely Kambaba or Crocodile Jasper variety)

Silicon Dioxide (SiO2) with inclusions

sedimentary
Conglomerate with Fossilized Shark Teeth (Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains) — sedimentary

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

sedimentary
Apache Tear (Obsidian (Hydrated Volcanic Glass - SiO2)) — igneous

Apache Tear

Obsidian (Hydrated Volcanic Glass - SiO2)

igneous
Red Siltstone (or Red Shale) (Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)) — sedimentary

Red Siltstone (or Red Shale)

Clastic Sedimentary Rock (Composition: primarily Quartz, Clay minerals, and Hematite Fe2O3)

sedimentary
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Quartzite Pebbles (Quartzite (SiO2)) — metamorphic

Quartzite Pebbles

Quartzite (SiO2)

metamorphic
Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

metamorphic
Iridescent Ammonite (Ammonoidea (Species: likely Cleoniceras or Desmoceras); Mineral: Aragonite/Ammolite (CaCO3)) — sedimentary (fossilized)

Iridescent Ammonite

Ammonoidea (Species: likely Cleoniceras or Desmoceras); Mineral: Aragonite/Ammolite (CaCO3)

sedimentary (fossilized)
Sandstone with trace fossil (Sandstone, possibly with Skolithos or similar trace fossil) — sedimentary

Sandstone with trace fossil

Sandstone, possibly with Skolithos or similar trace fossil

sedimentary
Slate (Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.) — sedimentary

Slate

Slate (a fine-grained, foliated metamorphic rock). Mineral composition: Primarily composed of mica minerals (muscovite, chlorite, sericite) and quartz, with minor amounts of hematite, pyrite, and other accessory minerals.

sedimentary