Fossilized Coral
Hexagonaria (Rugose and Tabulate coral fossils)
fossil
Category
Sedimentary (Man Made)
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
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Sandstone (Yellow/Siltstone variant)
Arenite (SiO2 primarily)
sedimentary
Sandstone (likely Arkose)
Arenite (Feldspathic Sandstone / Arkose)
sedimentary
Flint
SiO2 (Microcrystalline Quartz / Chert)
sedimentary
Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pink Opal
Amorphous Hydrous Silica (SiO2·nH2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Shale
Clastic Sedimentary Rock
sedimentary
Fluorite in Matrix
Calcium Fluoride (CaF2) with Quartz/Calcite matrix
mineral
Eye Agate
Chalcedony (Silicon Dioxide, SiO2)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Chert (specifically varieties like Chalcedony or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Quartz
SiO2 (Silicon Dioxide)
mineral
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sedimentary River Rock
Siliciclastic Sedimentary Rock (Quartzite or Sandstone pebble)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (with iron oxide staining)
Silicon Dioxide (SiO2)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Yellow or Honey Quartz
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz pebble
Quartz (Silicon dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
sedimentary
Veined Limestone
Sedimentary Calcite-Veined Rock (CaCO3)
sedimentary
Tumbled chalcedony or quartz-rich stone
Microcrystalline quartz, SiO₂; possibly pale chert or chalcedony
mineral
Red jasper pebble
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
metamorphic