Amber
Succinite
Organic (Mineraloid)
Category
Sedimentary (Biogenic Sediment Or Biological Remain)
Browse sedimentary (biogenic sediment or biological remain) specimens identified by the Rock Identifier community.
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Amber
Fossilized Tree Resin (Succinate)
mineral
Fossil brachiopod shell
Brachiopoda; exact genus and species cannot be determined from the image
fossil
Likely fossilized bone or tooth fragment
Indeterminate fossil bone; mineral replacement commonly calcite, silica, or iron oxides
fossil
Fossiliferous sandstone with plant fossils
Likely fossil-bearing siliciclastic sedimentary rock; apparent fragments may be fossil wood or leaf impressions, but species cannot be determined from the image
fossil
Yellow Quartzite (Onyx Pebble)
Silicon Dioxide (SiO2) - Quartzite
metamorphic
Fossil-bearing limestone
Calcite-rich limestone (mainly CaCO₃), with a possible shell fossil
sedimentary
Clam shell (likely a bivalve shell)
Bivalvia; shell composed primarily of calcium carbonate (usually aragonite and/or calcite)
fossil
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with organic fossil inclusions
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3)
sedimentary
Agatized Fossil (Druzy Agate)
Silicon Dioxide (SiO2) replacing organic matter
sedimentary
Amber
Succinite (fossilized resin)
mineral
Fossilized shell or small fossil fragment
Indeterminate fossil; possibly a partial gastropod or bivalve, mineralized with calcite
fossil
River Cobble with Algae Patina
Weathered Chert or Quartzite pebble (SiO2 dominated)
sedimentary
Fossilized Shark Tooth
Carcharhinus sp. (likely Bull or Requiem shark family)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Banded Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Olive Sea Shell Fossil
Oliva sp. (Calcium Carbonate, CaCO3)
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Amber (in Matrix/Shale)
Amber (Fossilized Tree Resin)
mineral
Fossiliferous Limestone
Calcareous biomicrite / Calcium Carbonate (CaCO3)
sedimentary
Amber
Resinite (Succinite if from the Baltic); Chemical Formula: C10H16O (approximate)
Organic Diamond/Gemstone (often associated with Sedimentary sequences)
Chert (also known as Flint or Common Chalcedony)
Cryptocrystalline Silica (SiO2)
sedimentary
Fossiliferous conglomerate
Bioclastic, carbonate-cemented conglomerate (likely limestone matrix)
sedimentary
Fossiliferous limestone (likely containing shell fossils)
Calcite-rich limestone, chiefly CaCO₃; visible fossils are uncertain from the image
sedimentary
Fossiliferous Limestone (Coral Fossil)
Scleractinian Coral in Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (with approximate formula C10H16O)
mineraloid
Polished calcite sphere
Calcite (CaCO₃), likely banded or massive calcite
mineral
Chert (Jasper or Flint variant)
Chert (composed of microcrystalline quartz, SiO2)
sedimentary
Orange Calcite (Iron-Stained)
Calcium Carbonate (CaCO3)
mineral
Banded Sedimentary Rock
Sedimentary Rock with Quartz/Feldspar Vein
sedimentary
Fossilized Gastropod Internal Mold
Gastropoda (Steinkern fossil)
fossil
Limestone with fossil crinoid stems
Calcium Carbonate (CaCO3) containing Crinoidea fossils
sedimentary
Coprolite
Coprolite (fossilized feces)
sedimentary
Fossiliferous Limestone (Crinoidal Limestone)
Bioclastic grainstone (CaCO3)
sedimentary
Likely ironstone pebble
Iron-oxide-rich concretion, composed mainly of goethite and/or hematite
sedimentary
Calcite (likely chalky calcite fragment)
Calcite, calcium carbonate (CaCO₃)
mineral
Fossilized tooth or bone fragment
Indeterminate fossil; possibly a small fossil tooth or mineralized bone, exact identification requires microscopy
fossil
Hag Stone
Perforated Flint or Chert (SiO2)
sedimentary