Petrified Wood
Silicified Wood (SiO2 permineralization)
sedimentary
Category
Sedimentary (Silicified Fossiliferous Chalcedony)
Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.
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Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Cream River Jasper
Silicified microcrystalline quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Mookaite Jasper
Silicified Radiolarite (SiO2 with impurities)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Red Jasper Conglomerate (Puddingstone)
Silicified Conglomerate (SiO2 with inclusions)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossil Coral (Favosites)
Favosites (Order: Tabulata, Phylum: Cnidaria)
sedimentary
Fossilized Brachiopod
Phylum Brachiopoda (Calcium Carbonate/Silica replacement)
sedimentary
Calcite-rich limestone
Limestone, primarily calcite (CaCO₃), possibly fossiliferous or dolomitic
sedimentary
Brachiopod Fossil in Chert
Phylum Brachiopoda within Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood Agate
Silicified Wood (primarily SiO2)
fossil
Brachiopod Fossil (Spiriferid)
Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)
sedimentary (fossilized organic remain)
Fossilized Coral (Petoskey Stone type)
Hexagonaria percarinata (Order: Rugosa)
sedimentary
Fossiliferous Limestone with Brachiopod
Phylum Brachiopoda in calcitic matrix
sedimentary
Coquina
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper/Mudstone variant)
Silicon Dioxide (SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Bamboo Leaf Jasper
Silicified Siltstone or Jasper (SiO2)
sedimentary
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Mookaite Jasper
Mookaite (variety of Chert/Jasper), Silicon Dioxide - SiO2
sedimentary
Mookaite Jasper
Radiolarite (SiO2)
sedimentary
Bivalve Fossil (Clam)
Class Bivalvia (e.g., Exogyra or Gryphaea species)
fossil
Chert (and Limestone)
Silicon Dioxide (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2-dominant)
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Bivalve Fossil (Clam Stone)
Phylum Mollusca, Class Bivalvia
fossil
Mookaite Jasper
Silicified Radiolarite (SiO2 with impurities)
sedimentary
Polished fossiliferous limestone pebble
Fossiliferous micritic limestone, chiefly calcite (CaCO₃)
sedimentary
Weathered limestone or calcareous sandstone
Calcite-rich carbonate rock, chiefly calcium carbonate (CaCO₃), possibly fossiliferous limestone
sedimentary
Orbicular Jasper (Eye Jasper / Kambaba-like pattern)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Limestone ( weathered ) / Chert Nodular Rock
Sedimentary rock (primarily Calcium Carbonate, CaCO3, with Microcrystalline Quartz, SiO2)
sedimentary
Weathered limestone or calcareous concretion
Calcite-rich carbonate rock; primarily calcium carbonate (CaCO₃), commonly calcite
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Sandstone (Water-worn Pebble)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary