Fossil Shark Tooth
Chondrichthyes (fossilized dentition)
fossil
Category
Organic (Paper And Cellulose)
Browse organic (paper and cellulose) specimens identified by the Rock Identifier community.
Learn about Organic (Paper And Cellulose) in the encyclopedia
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Fossil Snail Shell
Gastropoda fossil
fossil
Red Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Gastropod Shell
Gastropoda (calcium carbonate / aragonite)
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Chert Pebble
Chert (SiO2)
sedimentary
Sandstone (with Moss)
Quartz Arenite / Sandstone
sedimentary
Chert (Flint Nodules)
Silicon Dioxide (SiO2)
sedimentary
Amber jewelry (possibly amber-colored glass or resin)
Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image
gemstone
Polished amber-like chalcedony/jasper
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony or jasper; amber cannot be confirmed visually
mineral
Amber (Copal)
Fossilized Tree Resin
mineraloid
White limestone or chalky carbonate rock
Calcite-rich limestone; possibly chalk (CaCO₃)
sedimentary
Moss Agate
Cryptocrystalline Quartz (SiO2 with manganese or iron oxide inclusions)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with organic fossils
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone
sedimentary
Fossiliferous Limestone
Limestone with embedded fossil cross-section
sedimentary
Chert (Flint Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Amber (Copal)
Succinite (fossilized tree resin)
mineral
Pearl
Calcium carbonate (CaCO3) + organic conchiolin
gemstone
Sea Shell (Mollusk Shell)
Calcium Carbonate (Aragonite/Calcite)
fossil
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin (CaCO3)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinrite (Organic Gemstone)
mineraloid
Stromatolite
Biogenic sedimentary rock / Calcium carbonate
sedimentary
Limestone with Gastropod Fossil
Sedimentary Calcium Carbonate (CaCO3) with Gastropoda inclusion
fossil
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Amber
Succinite (a variety of fossilized tree resin); chemical formula appx. C10H16O
mineraloid
Amber
Succinite (Formula: C10H16O)
Organic Mineraloid
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Garden Quartz (Lodolite / Inclusion Quartz)
Quartz with inclusions (SiO2 with various mineral inclusions)
gemstone
Jet
Lignite (Precursor organic rock)
gemstone
Amber
Succinite
mineral
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Amber (Green variation)
Succinite
fossil
Precious Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3)
gemstone
Freshwater Pearl
Aragonite / Biogenic Calcium Carbonate (CaCO3)
mineral
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary