Petrified Wood (Agatized/Silicified 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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Petrified Wood
Petrified Wood (Silicified Wood)
fossil
Brecciated jasper
Silicified microcrystalline quartz (SiO₂), commonly iron-stained and brecciated
sedimentary
Petrified Wood with Lichen
Silicified Wood (SiO2) colonized by crustose lichens
fossil
Petrified Wood
Silicified wood (primarily quartz replacing organic cellulose)
fossil
Fossilized Brachiopod
Phylum Brachiopoda (General mineral composition: Calcite/CaCO₃ or Silica/SiO₂)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Crinoid Stem Fossil (Stone)
Crinoid columnal (Class Crinoidea)
fossil
Polished brecciated jasper
Microcrystalline quartz (chalcedony), commonly SiO₂, with iron-oxide and other mineral fragments
sedimentary
Petrified Wood
Silicified Wood (Permineralized organic matter, głównie $SiO_2$)
fossil
Petrified Wood
Silicified Wood
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement)
fossil
Banded brown jasper (likely picture jasper)
Silicified microcrystalline quartz/chalcedony (SiO₂), commonly iron-oxide stained
sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Fossiliferous Limestone
Biogenic Sedimentary Rock
sedimentary
Limestone
Calcite-rich carbonate rock (primarily CaCO₃)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (Sedimentary Rock)
fossil
Fossil Coral
Scleractinia / Rugosa (Silicified Coral)
fossil
Petrified wood
Silicified fossil wood, primarily quartz (SiO₂) replacing cellulose
fossil
Fossiliferous Shale
Fossiliferous Mudstone / Shale
sedimentary
Petrified Wood
Silicified Wood (SiO2 permineralization)
fossil
Petrified Wood
Silicified wood (Quartz / Chalcedony replacement)
fossil
Gray chalcedony (common agate/jasper fragment)
Microcrystalline quartz, SiO₂; likely chalcedony with weathered host-rock rind
mineral
Polished picture jasper
Silicified microcrystalline quartz (chalcedony), commonly called picture jasper
sedimentary
Jasper and Quartzite Breccia
Silicified sedimentary breccia
sedimentary
Fossilized wood, likely silicified petrified wood
Silicified wood (fossil wood; commonly quartz/chalcedony replacing organic tissue)
fossil
Tumbled yellow jasper or petrified wood fragment
Microcrystalline quartz (chalcedony), SiO₂, possibly iron-oxide-bearing jasper
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
sedimentary
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Fossiliferous limestone
Bioclastic limestone, predominantly calcite (CaCO₃)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Polished petrified wood
Silicified wood, primarily microcrystalline quartz (SiO₂) replacing cellular tissue
fossil
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Chert / Flint (Brecciated or Fossiliferous Limestone with Silicification)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Limestone with Fossil
Sedimentary limestone, calcium carbonate (CaCO3)
sedimentary
Tumbled reddish-brown stone, possibly jasper or quartzite
Uncertain; likely microcrystalline quartz (SiO₂), potentially iron-stained jasper
mineral
Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Polished leopard jasper (likely ocean jasper)
Silicified microcrystalline quartz/chalcedony; mainly SiO₂ with iron-oxide inclusions
sedimentary