Anthracite Coal
Anthracite
sedimentary
Category
Sedimentary (Man Made Composite)
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
Pyrite
Pyrite (FeS2)
Mineral
Travertine
Calcareous Tufa / Travertine (CaCO3)
sedimentary
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Igneous Rock
igneous
Chert (often called Flint)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Iron oxide inclusions)
sedimentary
Calcite
Calcium Carbonate (CaCO3)
mineral
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Shale
Argillaceous Rock
sedimentary
Sandstone
Arenite
sedimentary
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
sedimentary
Conglomerate
Conglomerate (SiO2 matrix with various silicate clasts)
sedimentary
Limestone (Weathered)
Calcium Carbonate (CaCO3)
sedimentary
Banded Sandstone (Wonderstone)
Sandstone with Liesegang Rings (SiO2 with Iron Oxides)
sedimentary
Fossilized Wood (with Coal and Limonite)
Petrified Wood (Silicified or Carbonized Flora)
sedimentary
Fossilized Gastropod (Snail)
Class Gastropoda (internal mold or 'steinkern')
sedimentary
Chert (Hagstone/Gasket Rock variant)
Chert (SiO2)
sedimentary
Glauconitic Sandstone
Glauconitic arenite (contains (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)
sedimentary
Ferruginous Sandstone
Arenite with Iron-oxide cement (composed of Quartz and Limonite/Hematite)
sedimentary
Fossil Coral (Favosites)
Favosites (Order: Tabulata, Phylum: Cnidaria)
sedimentary
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with impurities such as Fe2O3
sedimentary
Jasper or Agate-bearing Chert
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (Limestone-based)
Silicon Dioxide (SiO2)
sedimentary
Dalmatian Stone
Dalmatian Jasper (Aplitic Perthite)
igneous
Sandstone with Magnetite and Iron Staining
Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)
sedimentary
Chert / Flint Nodules in Sandstone
Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Banded Sandstone (Quartzite-rich)
Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)
sedimentary
Ferruginous Sandstone (Ironstone Conglomerate fragments)
Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)
sedimentary
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Siltstone with flute casts or scratch marks
Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)
sedimentary
Coquina / Limonite-stained Limestone
Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)
sedimentary
Hag Stone
Calcareous sedimentary rock (often Chert, Flint, or Limestone)
sedimentary
Sandstone Pebble with Iron Staining
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)
sedimentary
Banded Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)
sedimentary
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
sedimentary
Quartz (Chert/Chunky Chalcedony)
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic