Fossilized Shark Tooth (Megalodon or Carcharocles species fragment)
Otodus megalodon / Carcharocles spp. (Apatite / Calcium Phosphate)
fossil
Category
Organic Materia (Not A Rock Or Mineral)
Browse organic materia (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Organic Materia (Not A Rock Or Mineral) in the encyclopedia
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Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth (Partial) or Coprolite
Elasmobranchii (fossil) or Coprolite (trace fossil)
fossil
Amber
Succinite (Fossilized Tree Resin, C10H16O)
gemstone
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Fossiliferous Limestone Pebble
Calcite-rich Fossiliferous Marine Limestone
fossil
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Amber
Fossilized Resin (C10H16O)
mineral
Amber
Succinite (specifically for Baltic amber); approximate formula C10H16O
Mineraloid
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Amber
Amber (C10H16O)
mineral
Red Coral
Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)
Mineraloid (Organic Gemstone)
Pyrite in Shale
Iron Disulfide (FeS2) in Argillaceous Shale
sedimentary
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Chert (Iron-stained)
Chert (SiO2)
sedimentary
Fossiliferous Limestone (Crinoid stem)
CaCO3 (Calcium Carbonate) with Fossil Inclusions
sedimentary
Chert (variously identified as Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Ferruginous Sandstone (Ironstone)
Sedimentary rock with Limonite/Goethite cement
sedimentary
Chert / Jasper / Agate (Chalcedony Group)
Microcrystalline Quartz (SiO2)
sedimentary
Asphalt
Asphalt concrete
sedimentary
Coral Rock (Coquina)
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Amber
Succinite (C10H16O)
mineral
Chert (Quartz Variety)
Microcrystalline / Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Limestone) River Cobble
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Jasper Agate
Silicon dioxide (SiO2)
mineral
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2) with hydration
sedimentary
Chert Pebble (Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Chert (mostly SiO2 / Silicon Dioxide)
sedimentary
Fossiliferous Limestone
Limestone (CaCO3 with Bioclasts)
sedimentary
Chert (Yellow/Brown Jasper)
Silicon Dioxide (SiO2)
sedimentary
Pink Opal
Hydrated Amorphous Silica (SiO2·nH2O)
mineraloid
Amber
Fossilized tree resin (Amorphous organic polymer)
gemstone
Amber
Succinite (fossilized tree resin)
mineral
Chert (Jasper/Flint variant)
Microcrystalline quartz (SiO2)
sedimentary
Smurf Rock (Fictional Interpretation)
Cyanus Anthropomorphicus (Geologic Simulation)
Artificial/Fantasy Object
Amber
Succinite (Fossilized Resin)
mineral
Amber
Succinite (Fossilized Resin)
mineral
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Coral (Honeycomb Coral)
Favosites (extinct genus of Tabulate coral)
sedimentary