Ironstone Concretion
Ironstone (Siderite/Limonite/Goethite)
sedimentary
Category
Igneous And Fossil
Browse igneous and fossil specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (SiO2)
fossil
Coral Fossil (Favosites)
Favosites (order Tabulata)
fossil
Fossiliferous Limestone
Carbonate Sedimentary Rock (primarily CaCO3)
sedimentary
Limestone with Fossil Fragments
Bioclastic Carbonate Rock (CaCO3)
sedimentary
Crinoid Stem Fossil (in matrix)
Crinoid (Class Crinoidea)
fossil
Fossiliferous Limestone (Coquina / Shell Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Coquina (Fossiliferous Limestone)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fossilized Knightia Fish
Knightia eocaena (set in fossiliferous Micritic Limestone)
sedimentary
Limestone with Fossil Inclusion
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
fossil
Petrified Wood
Silicified Paleoxylon (SiO2)
fossil
Fossiliferous Limestone / Petoskey Stone (Coral Fossil)
Hexagonaria percarinata / Calcite (CaCO3)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Fossilized Brachiopod Shell
Order Spiriferida (likely)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Fossilized Shark Tooth
Elasmobranchii gen. indet.
fossil
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
fossil
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Petoskey Stone
Hexagonaria percarinata (Calcite / CaCO3)
fossil
Seashell (Cockle Shell)
Cardiidae (Bivalvia), primary composition: Calcium Carbonate (CaCO3) in the form of aragonite or calcite
fossil
Petrified Palm Wood
Palmoxylon
fossil
Amber
Fossilized Tree Resin (Succinite for Baltic varieties)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Coprolite
Coprolite (fossilized feces)
fossil
Petrified Wood
Silicified wood (primarily SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Charlevoix Stone
Favosites alpenensis
fossil
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3 with organic inclusions)
fossil
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Petrified Wood
Silicified Wood (Permineralized Lycopsid, Conifer, or Hardwood)
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
fossil
Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
fossil
Petrified Wood
Silicified wood (principally SiO2)
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil