Fossilized Shark Tooth
Chondrichthyes (Class)
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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Amber
Succinite (amorphous organic polymer)
mineral
Pearl
Organic Mineraloid (CaCO3 + Conchiolin)
mineral
Rough Amber (likely Copal or immature Amber)
Organic gemstone / Succinite (if Baltic)
mineral
Amber
Amber (Amorphous Organic Hydrocarbon)
mineral
Amber
Succinite (a fossilized organic resin)
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
mineral
Chert (River Pebble)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinite (fossilized tree resin)
fossil
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions of hornblende or chlorite
mineral
Chert / River Pebble
Microcrystalline Silica (SiO2)
sedimentary
Jasper with Chert
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossiliferous Shale Matrix
Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments
sedimentary
Anthracite Coal
Anthracite (Carbon-based metamorphic rock, 86-97% C)
metamorphic
Amber
Succinite (C10H16O)
mineral
Rock Specimen
Unclassified rock specimen
sedimentary
Glauconitic Sandstone
Glauconitic Sandstone (Greensand)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Sandstone Concretion with Fossil Wood
Ferruginous Sandstone Concretion (SiO2 with Fe2O3 cement)
sedimentary
Black Jasper (Etched)
Silicon Dioxide (SiO2) with impurities
mineral
Picture Jasper
SiO2
mineral
Chert (Agatized/Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint or Jasper)
Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)
sedimentary
Slate
Slate (foliated metamorphic rock, primarily composed of quartz, illite, chlorite, and micas)
metamorphic
Mocha Stone (Dendritic Agate)
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
sedimentary
Amber
Succinite (fossilized organic resin)
mineral
Amber
Succinite (Organic Mineraloid) - C10H16O
mineral
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth (fragment)
Elasmobranchii (Class) fossil
fossil
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Abalone Shell (Nacre)
Aragonite (CaCO3) - Biogenic Mineral
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
mineral
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class) fossil
fossil
Sandstone with Algae Growth
Arenite with Chlorophyta/Lichen
sedimentary
Coquina Limestone (Fossiliferous Limestone)
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Limestone (specifically Fossiliferous or Crinoidal Limestone)
Calcium Carbonate (CaCO3) - Calcite Rock
sedimentary