Brachiopod Fossil (Spiriferid)
Order Spiriferida (Phylum Brachiopoda); mineralized as Calcite (CaCO3) or Chert (SiO2)
sedimentary (fossilized organic remain)
Category
Sedimentary (Fossilized Organic Remain)
Browse sedimentary (fossilized organic remain) specimens identified by the Rock Identifier community.
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Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
fossil
Fossilized wood, likely silicified petrified wood
Silicified wood (fossil wood; commonly quartz/chalcedony replacing organic tissue)
fossil
Petrified wood
Silicified fossil wood, commonly quartz/chalcedony (SiO₂) replacing wood
fossil
Fossilized wood (petrified wood)
Silicified permineralized wood, commonly quartz (SiO₂) replacing or infilling woody tissue
fossil
Zebra Rock (Zebra Stone / Ribbon Stone)
Siltstone with Ferruginous Banding (Primarily Quartz, Kaolinite, and Hematite)
sedimentary
Pearl (in a decorative hair comb setting)
Calcium carbonate (CaCO3) primarily as Aragonite, bonded with Conchiolin
Organic Mineraloid
Polished fossilized wood
Silicified wood (petrified wood), commonly quartz/chalcedony replacing wood
fossil
Fossilized Shell Fragment
Bivalvia or Gastropoda (depending on original organism)
fossil
Petrified Wood Fragment
Silicified Wood (SiO2)
fossil
Amber (Copal)
Fossilized Tree Resin
mineraloid
Fossiliferous limestone
Bioclastic carbonate rock, chiefly calcite (CaCO₃), containing fossil fragments—possibly coral or bryozoan
fossil
Coral Fossil
Anthozoa (order Scleractinia)
fossil
Obsidian and Fossilized Shark Tooth
Obsidian (Volcanic Glass) and Otodus sp. (Fossilized shark tooth)
igneous and fossil
Coprolite
Fossilized Feces
fossil
Fossilized Nut / Coprolite / Concretion
Trace Fossil / Permineralized Plant Material
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Fossiliferous Shale
Carbonaceous Shale (with potential plant/aquatic fossils)
sedimentary
Fossilized Bone
Vertebrate fossil (mineralized bone)
fossil
Seashell Fossil
Gastropoda fossil
fossil
Fossilized Bone
Petrified Bone / Biogenic Sedimentary
fossil
Fossilized Shell Fragment
Invertebrate marine fossil, likely calcium carbonate replacement
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Amber
Succinate (Fossilized Resin)
mineral
Spondylus Oyster Calcification / Fossilized Oyster
Spondylus (Thorny Oyster) / Calcium Carbonate (CaCO3)
sedimentary
Amber
Succinate (Organic Fossilized Resin)
mineraloid
Amber
Succinite (a fossilized organic resin)
mineral
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with marine fossils
fossil
Amber (Copal)
Succinate (Fossilized Tree Resin)
mineraloid
Petrified Wood
Silicified Wood (SiO2)
mineral
Amber (and Cubic Zirconia)
Fossilized Tree Resin
mineraloid
Chert (Nodule)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Fossilized gastropod shell
Fossil Mollusca, class Gastropoda; likely a mineral-replaced or partially silicified shell
fossil
Flint with Fossil Inclusion
Cryptocrystalline quartz (SiO2) enclosing fossilized organic remains
sedimentary
Amber
Fossilized Tree Resin
gemstone
Tumbled yellow calcite (probable)
Calcite — calcium carbonate, CaCO₃
mineral
Coprolite
Fossilized Feces
sedimentary
Amber
Succinite (Fossilized Resin)
mineral
Lignite (Brown Coal)
Humic Lignite (Carbonaceous sedimentary rock)
sedimentary
Amber
Succinite (fossilized resin)
mineral
Fossiliferous Limestone
Limestone (Calcium Carbonate - CaCO3)
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil