Sandstone (Quartzite texture)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Fossiliferous Limestone
Calcite (CaCO3) Rich Bio-sedimentary Rock
sedimentary
Sandy Ironstone
Ferruginous Sandstone
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone Concretion
Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)
sedimentary
Handaxe with Inlaid Fossil Echinoid
Flint / Chert (SiO2) containing a fossil Conulus albogalerus
sedimentary (cryptocrystalline silica)
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Fossilized Oyster (Devil's Toenail)
Gryphaea (extinct genus of bivalve mollusks)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Coquina / Fossiliferous Limestone
Calcite-rich Bioclastic Sedimentary Rock (CaCO3)
sedimentary
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
metamorphic
Shale
Lutaceous Sedimentary Rock
sedimentary
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
sedimentary
Chert Pebble
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2 - Silicon Dioxide)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
metamorphic
Calamites (Fossilized Horsetail)
Calamites suckowii (Family: Calamitaceae)
sedimentary
Shale
Lutaceous sedimentary rock
sedimentary
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
Sandstone
Arenite (SiO2 + various cementing minerals)
sedimentary
Amber
Succinite (fossilized tree resin)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Marble
Metamorphosed Limestone (CaCO3)
metamorphic
Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
sedimentary
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
sedimentary
Crinoid Marble (Fossilized Limestone)
Crinoidal Limestone (comprising Calcite/Aragonite CaCO3)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Chert (Fossiliferous)
Silicon Dioxide (SiO2)
sedimentary
Fossilized Coral (Honeycomb Coral)
Favosites (extinct genus of tabulate corals), CaCO3 (Calcium Carbonate)
sedimentary
Sandstone
Arenite (SiO2 based with mineral cement)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (specifically Yellow/Brown Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
igneous
Sandstone
Arenite
sedimentary
Sandstone Chert Concretion
Silica-cemented Concretion (primarily SiO2)
sedimentary
Sandstone (with potential mineral inclusions)
Clastic sedimentary rock (primarily Quartz, SiO2)
sedimentary
Fossilized Shark Tooth (Cretaceous to Neogene)
Elasmobranchii dental fossil (likely Squalicorax or similar species)
mineral (biogenic replacement)
Fossiliferous Limestone
Calcite (CaCO3) with Bioclastic inclusions
sedimentary