Petrified Wood
Silicified Wood (SiO2)
fossil
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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Sandy Ironstone
Ferruginous Sandstone
sedimentary
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Iron-stained quartz-rich rock, possibly jasper or chert
Microcrystalline quartz (SiO₂) with iron oxides/hydroxides
mineral
Fossilized Shark Tooth
Chondrichthyes (class)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber
Succinite (fossilized resin)
mineral
Ironstone Concretion / Hematite Nodules
Ferruginous Sedimentary Rock (primarily Hematite Fe2O3 and Goethite FeO(OH))
sedimentary
Fancy Jasper
Silicon dioxide (SiO2)
sedimentary
Fossil Shark Tooth
Carcharodon or Carcharias fossil (Vertebrate Fossil)
sedimentary
Fossilized Rugose Coral in Limestone
Order Rugosa in Sedimentary Matrix (CaCO3)
fossil
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Yellow Jasper (Mookaite style)
Silicon Dioxide (SiO2) with Goethite/Hematite inclusions
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Baltic Amber
Succinite (Polmerized conifer resin)
mineraloid
Chert (Flint)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Amber
Succinite (specifically for Baltic Amber), Formula: C10H16O
Mineraloid
Septarian Nodule
Septarian Concretion (Calcite, Aragonite, and Limestone)
sedimentary
Fossilized Shark Tooth
Elasmobranchii fossil (likely Odontaspididae family)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Carnelian (Orange Chalcedony)
Silicon Dioxide (SiO2)
mineral
Glauconitic Sandstone (Greensand)
Glauconitic Sandstone ((K, Na)(Fe3+, Al, Mg)2(Si, Al)4O10(OH)2)
sedimentary
Fossil Coral (Favosites)
Favosites (Order: Tabulata, Phylum: Cnidaria)
sedimentary
Fossilized Shark Tooth
Chondrichthyes tooth
fossil
Fossilized Coral (Favosites)
Favosites (extinct genus of tabulate coral)
sedimentary
Fossilized Shark Tooth
Carcharhinus sp. (likely Bull or Requiem shark family)
sedimentary
Amber (Copal)
Succinate (Fossilized Resin)
mineraloid
Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Amber
Succinite (fossilized resin)
mineral
Ferruginous Sandstone (Ironstone)
Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)
sedimentary
Graphite Schist
C (Carbonaceous Schist)
metamorphic
Chert / Flint
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (variant Flint/Jasper)
Microcrystalline Opaline Silica (SiO2)
sedimentary
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Amber
Succinite (Fossilized Resin C10H16O)
Organic Mineraloid
Fossilized Bivalve Shell
Bivalvia (Phylum Mollusca)
fossil
Moss Agate
Silicon Dioxide with inclusions (SiO2)
mineral
Dendritic Agate (Tree Agate)
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxides
mineral