Dendritic sandstone
Sandstone with Manganese Oxide dendrites
sedimentary
Category
Sedimentary (Base), Then Artificial
Browse sedimentary (base), then artificial specimens identified by the Rock Identifier community.
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Blue Agate (Dyed)
Silicon Dioxide (SiO2)
Sedimentary (formed from silica deposits)
Gravel / Small Pebble
Rock Fragment (Gravel)
sedimentary
Veined Limestone
Sedimentary Calcite-Veined Rock (CaCO3)
sedimentary
Painted River Rock
Anthropogenic-modified Siliciclastic Sedimentary Rock
Sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
Magnesite or Howlite (dyed or naturally patterned)
Magnesium carbonate (MgCO3) or Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Chert (Common Chert)
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (predominantly SiO2)
sedimentary
River Pebble
Weathered Rock Fragment
sedimentary
Quartzite Conglomerate
Conglomerate (SiO2 rich)
sedimentary
Brachiopod or Bivalve Fossil in Limestone
Phylum Brachiopoda or Bivalvia (embedded in Calcium Carbonate matrix)
fossil
Sandstone
Arenite (SiO2 based)
sedimentary
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
metamorphic
Sandstone
Sandstone ( преимущественно SiO2 )
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Vuggy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Fossilized tooth, possibly a shark tooth
Indeterminate fossil tooth; species cannot be identified from this view
fossil
Conglomerate
Conglomerate rock
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Bituminous Coal
Organic Sedimentary Rock (Carbon-based)
sedimentary
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Bivalve Fossil (Clam Stone)
Phylum Mollusca, Class Bivalvia
fossil
Limestone with Fossil Fragment
Sedimentary carbonate rock (CaCO3)
sedimentary
Limestone Pebble
Sedimentary carbonate rock (CaCO3)
sedimentary
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Painted River Rock
Polished fluvial clast with acrylic/synthetic pigment coating
Sedimentary or Metamorphic (base substrate)
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Jasper (likely Kambaba or Crocodile Jasper variety)
Silicon Dioxide (SiO2) with inclusions
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Limestone Pebble
Calcium Carbonate (CaCO3)
sedimentary
Sparkling Druzy Quartz on Matrix
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Limestone pebble
Sedimentary rock, primarily calcium carbonate (CaCO3)
sedimentary
Sandstone pebble
Sandstone (Quartz-rich Arenite)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary