Shale
Argillaceous Sedimentary Rock
sedimentary
Category
Sedimentary (Anthropogenic)
Browse sedimentary (anthropogenic) specimens identified by the Rock Identifier community.
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Hag Stone
Perforated Sedimentary Rock
sedimentary
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
sedimentary
Sandstone Cobble
Clastic Sedimentary (Sandstone)
sedimentary
Breciated Limestone with Calcite Veins
Sedimentary Breccia (CaCO3)
sedimentary
Limestone
Sedimentary Calcite (CaCO3)
sedimentary
Shale or Mudstone River Pebble
Argillaceous sedimentary rock
sedimentary
Sandstone (likely Siltstone or fine-grained Sandstone)
Sedimentary Rock (Clastic)
sedimentary
Wood Stone (Dragon Stone variant)
Argillaceous Sedimentary Rock
sedimentary
River Pebble (Greywacke or Siltstone)
Clastic Sedimentary Rock
sedimentary
Shale or Siltstone
Sedimentary Rock (Siliciclastic)
sedimentary
Coal (Bituminous)
Sedimentary carbonaceous rock
sedimentary
Conglomerate
Clastic Sedimentary (Conglomerate)
sedimentary
Limestone Breccia
Sedimentary Breccia (Calcareous)
sedimentary
Siltstone or Mudstone
Argillaceous sedimentary rock
sedimentary
Shale
Lutaceous sedimentary rock
sedimentary
Weathered sandstone or siltstone
Clastic sedimentary rock, chiefly quartz and feldspar grains cemented by clay, silica, or iron oxides
sedimentary
Likely weathered sandstone or iron-stained sedimentary rock
Quartz-rich sandstone; exact identification is limited by the blurred photograph
sedimentary
Fossil-bearing sedimentary rock, likely with a fossil shell or ammonite cross-section
Fossiliferous limestone or calcareous mudstone; fossil identity is uncertain from the image
fossil
Small weathered mineral/rock fragment
Indeterminate; possibly quartz-bearing feldspathic rock or calcite-rich specimen
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Brown Jasper (Tumbled)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Red Jasper and Hematite
Silicon Dioxide (SiO2) and Iron Oxide (Fe2O3)
mineral
Red Jasper or Ironstone concretion
SiO2 or Fe2O3
sedimentary or mineral
Aragonite Star Cluster (Cross-section)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
sedimentary
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
sedimentary
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Chert Nodule with Chalky Cortex)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
mineral
Manganese Ore (Psilomelane/Pyrolusite)
Psilomelane ((Ba,H2O)2Mn5O10) and Pyrolusite (MnO2)
Mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Pink sandstone pebble
Quartz-rich sandstone, likely arkosic or ferruginous sandstone
sedimentary