Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
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Sandstone (likely Arkose)
Arenite (Feldspathic Sandstone / Arkose)
sedimentary
Sandstone (Yellow/Siltstone variant)
Arenite (SiO2 primarily)
sedimentary
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Jasper with Dendritic Inclusions
Microcrystalline Quartz (SiO2) with manganese or iron oxide inclusions
sedimentary
Botryoidal Quartz or Chalcedony
Silicon Dioxide (SiO2)
mineral
Fossil Coral
Cnidaria Anthozoa (Fossilized)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone
Arenite (predominantly SiO2)
sedimentary
Weathered Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Bituminous Coal
Bituminous coal (Carbonaceous sedimentary rock)
sedimentary
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Chert with Desert Varnish
Cryptocrystalline Quartz (SiO2) with Manganese/Iron oxide coating
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Sedimentary River Rock
Siliciclastic Sedimentary Rock (Quartzite or Sandstone pebble)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow or Honey Quartz
Silicon Dioxide (SiO2)
mineral
Manganese Oxide Crust on Limestone
Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Pink Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral