Shale or Siltstone
Fine-grained siliciclastic sedimentary rock
sedimentary
Category
Sedimentary (Synthetic)
Browse sedimentary (synthetic) specimens identified by the Rock Identifier community.
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Sandstone Pebble
Sandstone (primarily SiO2)
sedimentary
Shale with Siltstone layering
Sedimentary Clastic Rock (Mudstone/Shale)
sedimentary
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (lithic)
Lithic Wacke / Arenite
sedimentary
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Brachiopod Fossil in Sedimentary Matrix
Phylum Brachiopoda in Siltstone/Mudstone matrix
fossil
Weathered sandstone or arkosic sandstone
Clastic sandstone, likely quartz–feldspar-rich (arkose)
sedimentary
Flesh-toned Siltstone
Siltstone (composed of microscopic Quartz and Feldspar grains)
sedimentary
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Shale
Sedimentary pelitic rock
sedimentary
Weathered sandstone fragment
Quartz-rich sandstone, likely ferruginous sandstone
sedimentary
Quartz-veined Sandstone
Quartzite-veined Arenite / SiO2 and quartz sand
sedimentary
Ironstone Concretion / Chert Nodules
Iron-rich Sedimentary Concretion (Fe2O3 / SiO2 mix)
sedimentary
Ironstone (Limonite/Hematite concretion)
Ferruginous Siltstone / Goethite (FeO(OH))
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Chert / Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Yellow Ocher (Iron-rich Silt/Clay)
Goethite-rich Limonite (FeO(OH)qnH2O)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Shale
Shale (fine-grained clastic sedimentary rock)
Sedimentary
Rounded brown pebble, likely weathered sandstone or iron-stained quartzite
Probable quartz-rich sandstone (SiO₂-dominated); exact identification requires testing
sedimentary
Shale
Mudrock / Fissile Shale
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Banded Jasper (Mookaite / Chert)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossil Coral
Tabulate Coral (potentially Favosites or Calapoecia)
fossil
Gastropod Steinkern (Internal Mold Fossil)
Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix
sedimentary
Shale (or Mudstone)
Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock
sedimentary
Chert (Tan/Yellow variety)
Microcrystalline quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide (Fe2O3) cement
sedimentary
Weathered sandstone or siltstone
Clastic sedimentary rock, chiefly quartz and feldspar grains cemented by clay, silica, or iron oxides
sedimentary
Chert (Common Opal/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Agate
SiO2
mineral
Fossil Shell
Invertebrate fossil (Mollusca)
fossil
Knightia Fossil in Limestone
Knightia eocaena in micritic limestone
sedimentary
Puddingstone (Gowganda)
Gowganda Formation Conglomerate
sedimentary