Rock Identifier

Category

Rock (Likely Sedimentary)

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

Jasper (Yellow Jasper) (Silicon Dioxide (SiO2) with iron inclusions) — sedimentary

Jasper (Yellow Jasper)

Silicon Dioxide (SiO2) with iron inclusions

Limestone (Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)) — sedimentary

Limestone

Calcareous sedimentary rock (primarily Calcium Carbonate, CaCO3)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Chert with Asphaltum (or Tar) (Silica (SiO2) with natural Bitumen/Asphaltum) — sedimentary

Chert with Asphaltum (or Tar)

Silica (SiO2) with natural Bitumen/Asphaltum

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Chert (Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (specifically Tan/Gray Chert) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Conglomerate (Clastic sedimentary rock (Polymictic Conglomerate)) — sedimentary

Conglomerate

Clastic sedimentary rock (Polymictic Conglomerate)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Bituminous Coal (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

Dalmatian Stone (Dalmatian Jasper (Aplitic Rock)) — igneous

Dalmatian Stone

Dalmatian Jasper (Aplitic Rock)

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone Geode (Unbroken) (Siliciclastic sedimentary rock (primarily Quartz)) — sedimentary

Sandstone Geode (Unbroken)

Siliciclastic sedimentary rock (primarily Quartz)

Sandstone (with potential trace fossils) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Green Fluorite (likely synthetic or heat-treated for jewelry) (Calcium Fluoride (CaF2)) — mineral

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Asphalt (Bituminous Slate/Sandstone) (Asphaltum / Bituminous Rock) — sedimentary

Asphalt (Bituminous Slate/Sandstone)

Asphaltum / Bituminous Rock

Sandstone (Quartz Arenite) (Sandstone (Chemical formula: primarily SiO2)) — sedimentary

Sandstone (Quartz Arenite)

Sandstone (Chemical formula: primarily SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Limestone (specifically Dolomitic/Crystalline Limestone) (Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)) — sedimentary

Limestone (specifically Dolomitic/Crystalline Limestone)

Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)

Ferruginous Sandstone (Ironstone) (Sedimentary rock with Limonite/Goethite cement) — sedimentary

Ferruginous Sandstone (Ironstone)

Sedimentary rock with Limonite/Goethite cement

Limestone (with Iron-Oxide staining) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (with Iron-Oxide staining)

Sedimentary Calcium Carbonate (CaCO3)

Ocherous Sandstone (Ferruginous Sandstone) (Ferruginous Arenite (SiO2 with Fe2O3)) — sedimentary

Ocherous Sandstone (Ferruginous Sandstone)

Ferruginous Arenite (SiO2 with Fe2O3)

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

Jasper or Chalcedony

Microcrystalline Quartz (SiO2)

Tumbled Carnelian and Quartz Mix (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Tumbled Carnelian and Quartz Mix

Silicon Dioxide (SiO2) with iron oxide impurities

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

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

Carnelian (Carnelian Agate)

Silicon dioxide (SiO2) - a variety of Chalcedony

Chert (Flint) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Cryptocrystalline Quartz (SiO2)

Quartz Geode (partially opened) (Silicon Dioxide (SiO2) with iron staining) — mineral

Quartz Geode (partially opened)

Silicon Dioxide (SiO2) with iron staining

Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

Sandstone (River Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (River Pebble)

Arenite (primarily SiO2)

Sandstone (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (primarily SiO2)

Greywacke (River Pebble with Quartz Veins) (Greywacke (Indurated Sandstone); Veins: SiO2 (Quartz)) — sedimentary

Greywacke (River Pebble with Quartz Veins)

Greywacke (Indurated Sandstone); Veins: SiO2 (Quartz)

$Sandstone (with prominent jointing/fractures) (Arenite (composed primarily of SiO2)) — sedimentary$

Sandstone (with prominent jointing/fractures)

Arenite (composed primarily of SiO2)

Sandstone (Sandstone (various mineral compositions)) — Sedimentary

Sandstone

Sandstone (various mineral compositions)

Dalmatian Stone (Dalmatian Jasper (actually a Peralkaline Igneous Rock)) — igneous

Dalmatian Stone

Dalmatian Jasper (actually a Peralkaline Igneous Rock)

Sandstone (Ferruginous) (Ferruginous Sandstone (SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)

Limestone (Fossiliferous) (Calcium Carbonate (CaCO3) - Bioclastic Limestone) — sedimentary

Limestone (Fossiliferous)

Calcium Carbonate (CaCO3) - Bioclastic Limestone

Sandstone (Ferruginous) (Arenite (with Iron Oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide cement)

Sandstone (Quartzose Pebble) (Clastic Sedimentary Rock (Litharenite/Quartz arenite)) — sedimentary

Sandstone (Quartzose Pebble)

Clastic Sedimentary Rock (Litharenite/Quartz arenite)