Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Red Sandstone
Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)
Chalcedony (variations like Agate or Jasper)
Chalcedony (SiO₂ - microcrystalline quartz)
Ferruginous Sandstone
Sandstone, Iron-rich
Barite Rose on Marcasite
Barium Sulfate (BaSO4) on Iron Sulfide (FeS2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
Chert (Field Stone)
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Sandstone
Arenite (SiO2 based)
Fossiliferous Limestone
CaCO3 (with biological inclusions)
Limestone with Fossil
Sedimentary limestone, calcium carbonate (CaCO3)
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)
Fossiliferous Limestone with Crinoid Stem
Sedimentary Rock with Echinodermata fossil fragment
Sandstone (Weathered Cobble)
Clastic Sedimentary Rock (primarily SiO2)
Celestite
Celestine (SrSO4)
Jasper Pendant
Chalcedony (Quartz) - SiO2
Jasper with Quartz Vein
Microcrystalline quartz (SiO2) with impurities
Jasper and Chalcedony
Silicon Dioxide (SiO2) microcrystalline quartz
Limonite Sandstone
Ferruginous Sandstone (Hydrated Iron Oxide)
Fossiliferous Limestone
Fossiliferous Calcilutite / Biomicrite
Chert (Flint)
Silicon Dioxide (SiO2)
Sandstone
Arenite
Coal
Anthracite or Bituminous Coal (Carbon)
Sandstone
Arenite (SiO2 main component)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Sandstone
Arenite
Limestone
Calcium Carbonate (CaCO3)
Sandstone (Yellow/Tan)
Clastic sedimentary rock (primarily SiO2 with iron oxide staining)
Sandstone (specifically Banded Sandstone)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Limestone
Calcium Carbonate (primarily CaCO3 as Calcite or Aragonite)
Limestone with Calcite Crystals
Calcium Carbonate (CaCO3)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
Marble
Recrystallized Calcite (CaCO3)
Sandstone Concretion
Clastic sedimentary rock (primarily Silica, SiO2, or Calcium Carbonate, CaCO3)
Sea Shell (Mollusk Shell)
Calcium Carbonate (Aragonite/Calcite)
Limestone
Calcium Carbonate (CaCO3)
Quartz Pebble
Silicon Dioxide (SiO2)
Limestone
Calcium carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)