Fossilized Coral (Honeycomb Coral)
Favosites (extinct genus of tabulate corals), CaCO3 (Calcium Carbonate)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Fossilized Organic Remain) in the encyclopedia
View all →
Crinaudite / Fossilized Crinoid Stem
Crinoid (Echinodermata) in a Calcitic/Siliceous Matrix
sedimentary
Fossilized Sea Urchin Spines
Echinoidea (Cidaroid spines)
sedimentary
Amber
Succinates
mineraloid
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Mica (specimen appears to be Muscovite or Phlogopite)
Phyllosilicate mineral; Muscovite: KAl2(AlSi3O10)(F,OH)2
Mineral (Found in Igneous and Metamorphic rocks)
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Fossiliferous Sandstone (with Brachiopod or Bivalve mold)
Clastic Sedimentary Rock with Macrofossil Mold
sedimentary
Limestone with Fossil Fragments
Bioclastic Carbonate Rock (CaCO3)
sedimentary
Mosasaur Tooth
Mosasaurus beaugei (Fossilized Tooth)
fossil
Shark Tooth Fossil
Chondrichthyes fossil
fossil
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint nodule)
Chert (SiO2)
sedimentary
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Porphyritic Basalt
Porphyritic Basalt with Plagioclase Phenocrysts
igneous
Porphyry
Porphyritic Andesite/Basalt
igneous
Porphyry
Porphyritic Andesite/Basalt
igneous
Sandstone
Sandstone (various mineral compositions)
Sedimentary
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Amber
Succinite (C10H16O)
mineraloid
Chert (Green and Black Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Fulgurite
Lechatelierite (Fused Silica)
mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite Pebble (River Rock)
Quartzite (primarily SiO2)
metamorphic
Fossilized Shark Tooth (Cretaceous to Neogene)
Elasmobranchii dental fossil (likely Squalicorax or similar species)
mineral (biogenic replacement)
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Fossilized Tabulate Coral (Honeycomb Coral)
Favosites (Order: Tabulata)
sedimentary
Fossilized Coral (Petoskey Stone / Favosites)
Favosites (extinct genus of tabulate coral)
sedimentary
Gastropod Steinkern (Fossilized Snail Cast)
Phylum Mollusca, Class Gastropoda (Commonly CaCO3 or SiO2 after replacement)
Sedimentary
Petoskey Stone (Weathered/Rough Form)
Hexagonaria percarinata
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Porphyry
Porphyritic Basalt or Andesite
igneous
Porphyritic Andesite
Andesite (with white Plagioclase phenocrysts)
igneous
Petoskey Stone
Hexagonaria percarinata
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Milky Quartz with Dendritic Inclusions
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Fossilized Tabulate Coral (Honeycomb Coral)
Favosites (Order: Tabulata)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Cobble
Quartzite (principally SiO2)
metamorphic