Amber
Fossilized Resin (C10H16O)
mineral
Category
Sedimentary (Fossilized Organic Matter)
Browse sedimentary (fossilized organic matter) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized Organic Matter) in the encyclopedia
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Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Likely chert or flint
Microcrystalline quartz (SiO₂), commonly called chert; exact identification requires testing
sedimentary
Calcareous Tufa / Limestone Fragment
Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (Fossilized Resin)
mineral
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Organic Gemstone (often associated with Sedimentary sequences)
Amber
Succinite (a fossilized organic resin containing succinic acid)
mineraloid
Fossilized Oyster Shell (Limestone/Coquina)
Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinite (Resinous fossilized tree sap)
Mineraloid
Petoskey Stone
Hexagonaria percarinata (Fossilized Coral)
sedimentary
Quartz River Pebble with Algae
Silicon Dioxide (SiO2) with organic biofilm
metamorphic or igneous
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Limestone (Porous/Travertine variant)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Fossilized turtle shell fragment
Testudines indeterminate; shell bone permineralized with silica/carbonate minerals
fossil
Palm Wood Fossil
Palmoxylon
fossil
Fossilized Shark Tooth
Carcharodon carcharias (fossilized) / Hydroxyapatite permineralized with silica or iron
sedimentary
Ironstone Concretion / Goethite-Hematite Geode
Goethite / Hematite Concretion (Fe3O4 / FeO(OH) / Fe2O3)
sedimentary
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral impurities
sedimentary (chemical/biological origin)
Ammonite Fossil
Ammonoidea (Calcium carbonate - CaCO3)
sedimentary
Dragon Stone
Ohko Stone (Argillaceous sedimentary rock)
sedimentary
Chert (Flint Nodules)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: CaCO3 - Calcite, Aragonite, and Siderite/Limestone)
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) - Opaque Chert/Quartzite variety
sedimentary
Fossilized Shark Tooth
Lamniformes (order) fossil
fossil
Moss Agate
Chalcedony (SiO2 with inclusions)
mineral
Fossilized Shark Tooth
Carcharocles sp. (likely Lemon or Sand Tiger)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Moss Agate
Silicon Dioxide with inclusions (SiO2 + impurities)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Coquina
Biogenic Limestone (Calcium Carbonate - CaCO3)
sedimentary
Chert (with Quartz vein)
Chert (Silicon Dioxide, SiO2)
sedimentary
Fossilized Shark Tooth
Eocene Lamniformes (Mackerel Shark clade)
fossil
Amber
Succinite (Fossilized Resin)
gemstone
Amber
Succinates (Organic Fossilized Resin)
mineraloid
Fossilized Shark Tooth
Chondrichthyes (Class) fossil
fossil
Amber
Succinates (Organic Fossilized Resin)
mineral
Fluorite
Fluorite (CaF2)
mineral
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
mineral
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
sedimentary