Petrified Wood
Silicified Wood (SiO2)
metamorphic
Category
Sedimentary (Silicified Fossiliferous Chalcedony)
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
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Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone (Weathered)
Calcium Carbonate (CaCO3)
sedimentary
Fossilized Coral (Favosites)
Favosites (Extinct Tabulate Coral)
sedimentary
Mookaite Jasper
Silicified Porcellanite (SiO2 with impurities)
sedimentary
Polished orbicular jasper (likely ocean jasper)
Silicified microcrystalline quartz/chalcedony (SiO₂), with iron-oxide and other mineral inclusions
gemstone
Weathered fossiliferous limestone
Calcitic limestone, predominantly calcium carbonate (CaCO₃), possibly containing shell or coral fossil fragments
sedimentary
Fossiliferous Limestone (Bivalve Fossil)
Calcium Carbonate (CaCO3) with Bivalvia fossil
sedimentary
Fossilized Horn Coral
Rugosa (Rugose Coral)
fossil
Mookaite Jasper
Silicified radiolarian ooze (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Fossil Sponge / Horn Coral / Crinoid Stem
Phylum Porifera or Cnidaria fossilized in calcium carbonate / silica
fossil
Glauconitic Sandstone
Glauconitic Quartz Arenite
sedimentary
Fossiliferous Limestone
Sedimentary rock containing Indeterminate Fossil remains (likely Crinoid stem or Bryozoan fragment)
fossil
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
sedimentary
Rugose Coral (Horn Coral Fossil)
Order Rugosa (fossilized in limestone/chert)
sedimentary
Fossil Coral (Petoskey-style Rugose Coral)
Hexagonaria percarinata (Order: Rugosa)
sedimentary
Mookaite Jasper
Radiolarite (Silicified radiolarian chert)
sedimentary
Petrified Wood
Silicified wood (Quartz / Chalcedony replacement of organic cellulose)
fossil
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of organic matter)
fossil
Limestone
Limestone (CaCO3)
sedimentary
Sandstone (likely Quartzose type)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Coquina or Fossiliferous Sandstone
Fossiliferous Calcarenite (CaCO3 with SiO2 inclusions)
sedimentary
Coquina / Fossiliferous Limestone
Fossiliferous Calcarenite (Calcium carbonate, CaCO3)
sedimentary
Fossiliferous Limestone (with Oyster Fossils)
Fossiliferous Calcarenite / Bivalve Mollusk Fossil
sedimentary
Bumblebee Jasper
Fossiliferous Calcite containing Orpiment and Realgar
sedimentary
Chert (Mookaite style)
Silicon Dioxide (SiO2) with various inclusions
sedimentary
Chert / Fossilized Burrow Cast
Microcrystalline Quartz (SiO2) with Trace Carbonates
sedimentary
Limestone Breccia
Sedimentary Breccia (Calcareous)
sedimentary
Pitted Limestone with Honeycomb Weathering
Karst-weathered fossiliferous limestone (CaCO3)
sedimentary
Fossiliferous Chert or Agate
Microcrystalline quartz (SiO2) with fossiliferous inclusions
sedimentary
Vesicular Limestone with Borings
Fossiliferous Calcarenite (Calcium Carbonate, CaCO3)
sedimentary
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Script Jasper
Cryptocrystalline Quartz (SiO2) with fossiliferous inclusions
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Sandstone or Mudstone
Sedimentary Rock
sedimentary
Jasper and Quartz Breccia
Silicified Breccia / Microcrystalline Quartz
sedimentary
Mookaite Jasper
Mookaite (Silicified radiolarite, SiO2)
sedimentary
Petrified Wood
Silicified wood (principally SiO2)
sedimentary