Petrified Wood
Silicified wood (SiO2)
sedimentary
Category
Organic Material (Likely A Fruit Or Berry)
Browse organic material (likely a fruit or berry) specimens identified by the Rock Identifier community.
Learn about Organic Material (Likely A Fruit Or Berry) in the encyclopedia
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Clam Fossil
Bivalvia fossil
fossil
Chert / Flint
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Bone Fragment
Vertebrate Fossil
fossil
Bivalve seashell
Calcareous shell, primarily aragonite (CaCO₃); likely a modern cockle or related bivalve
fossil
Polished jasper, likely orbicular or brecciated jasper
Jasper: microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides and other inclusions
mineral
Pink shell fragment
Calcium carbonate, likely aragonite or calcite (CaCO₃); probably a bivalve or gastropod shell fragment
fossil
Fossiliferous Limestone
Carbonate Rock (CaCO3 with organic inclusions)
sedimentary
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
sedimentary
Polished Baltic amber with insect inclusion
Amber (fossilized plant resin), chiefly polymerized diterpenoid resin; likely succinite
gemstone
Fossilized bone fragment
Fossil bone, composed chiefly of carbonate-fluorapatite (bioapatite)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Polished fossiliferous limestone (likely crinoidal or coral limestone)
Bioclastic carbonate rock, chiefly calcite (CaCO₃)
sedimentary
Chert (Chalcedony/Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Flint (chert) with chalcedony/quartz
Microcrystalline quartz, SiO₂; likely flint or siliceous chert with a chalcedonic edge
sedimentary
Graphite-rich metamorphic rock (probable graphite schist)
Graphite schist; predominantly graphite (C) with quartz and mica
metamorphic
Banded Chert (likely Flint or Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Amber
Succinited (C10H16O)
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Fossilized Gastropod Shell
Gastropoda (calcium carbonate / aragonite)
fossil
Petrified Wood
Silicified wood (SiO2)
sedimentary
Fossilized Bone
Permineralized Dinosaur or Megafauna Bone
fossil
Fossilized Shell Fragment
Invertebrate fossil / Brachiopod or Mollusk shell fragment (Calcium carbonate, CaCO3)
fossil
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Shark Tooth Fossil
Fossilized Chondrichthyes Tooth
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Black Onyx and Mother of Pearl
Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)
mineral
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Fossil Shark Tooth
Chondrichthyes (Class)
fossil
Jasper
Silicon dioxide (SiO2)
sedimentary
Fossilized wood (petrified wood), likely silicified
Petrified wood; predominantly microcrystalline quartz (SiO₂) replacing wood tissue
fossil
Fossil Shark Tooth
Chondrichthyes (fossilized dentition)
fossil
Fossil Snail Shell
Gastropoda fossil
fossil
Shark Tooth Fossil
Chondrichthyes fossil
fossil
Petrified Wood
Silicified Wood / Fossilized Xylem
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified wood (SiO2)
sedimentary
Fossilized Shark Tooth
Chondrichthyes teeth
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Jasper
Microcrystalline quartz (SiO2)
sedimentary