Petrified Wood
Silicified wood (SiO2)
fossil
Category
Organic (Paper And Cellulose)
Browse organic (paper and cellulose) specimens identified by the Rock Identifier community.
Learn about Organic (Paper And Cellulose) in the encyclopedia
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Fossiliferous Limestone
Biogenic Sedimentary Rock (Calcite, CaCO3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Silicified wood (SiO2)
fossil
Shark Tooth Fossil
Chondrichthyes (shark) tooth
fossil
Petrified Wood
Silicified wood (SiO2)
sedimentary
Chrysanthemum Stone
Celestite or Calcite crystal aggregates in limestone
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony, SiO2)
fossil
Petrified Wood
Silicified wood (SiO2)
sedimentary
Shiva's Eye (Cat's Eye Shell)
Operculum of Turbo marmoratus
fossil
Calcite
Calcium Carbonate (CaCO3)
mineral
Shark Tooth Fossil
Fossilized Chondrichthyes Tooth
fossil
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Turritella Agate
Chalcedony quartz with fossilized Elimia tenera gastropods
sedimentary
Petrified Wood
Silicified Wood
fossil
Moss Agate
SiO2
mineral
Shark Tooth Fossil
Chondrichthyes dentition
fossil
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartz pebble or seed/crumb
SiO2 (if quartz)
mineral
Fossiliferous Limestone
Fossiliferous Limestone (CaCO3)
sedimentary
Shale fragment
Shale (Laminated Mudstone)
sedimentary
Amber
Amber (C10H16O)
mineral
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin
gemstone
Likely bituminous coal
Coal, predominantly carbon-rich organic matter with variable maceral and mineral content
sedimentary
Amber
Fossilized Tree Resin
gemstone
Smoky quartz crystal
Quartz (silicon dioxide, SiO₂), smoky variety
mineral
Petrified Wood
Fossilized Xylem (SiO2)
fossil
Fossilized bone fragment
Fossil bone, composed chiefly of carbonate-fluorapatite (bioapatite)
fossil
Jasper
Chalcedony (SiO2)
mineral
Fossil Shark Tooth
Selachii fossil
fossil
Jasper
Microcrystalline quartz (SiO2)
sedimentary
Amber
Organic gemstone (Succinite)
mineral
Shark Tooth Fossil
Vertebrate fossilized dental remain
fossil
Sedimentary Rock
Sedimentary rock (lithified sediment)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Moss Agate
Silicon dioxide (SiO2)
gemstone