Fossilized Shark Tooth (Root Portion)
Selachimorpha (partial specimen)
fossil
Category
Organic Structure (Not A Rock)
Browse organic structure (not a rock) specimens identified by the Rock Identifier community.
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Amber
Succinite (specifically for Baltic amber); chemical formula approx. C10H16O
Organic Gemstone (fossilized resin)
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Chiton (Polyplacophora)
Polyplacophora (fossilized valves)
mineralized fossil
Fossilized Rugose Coral (Horn Coral)
Order Rugosa
sedimentary
Fossil Bivalve / Ostreid Shell (Hag Stone / Perforated Pebble)
Phylum Mollusca, Class Bivalvia
fossil
Amber
Succinite (C10H16O)
mineraloid
Limestone with Fossil Inclusion
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Natural Pearl (appearing in a jewelry setting)
Calcium Carbonate (mostly Aragonite), CaCO3 with Conchiolin
mineral
Amber
Succinite (fossilized resin)
mineral
Graphite
Graphite (Carbon, C)
mineral
Petrified Wood
Fossilized plant material (Silicon dioxide - SiO2)
fossil
Shark Tooth Fossil
Carcharhiniformes or Lamniformes (order level fossil)
fossil
Amber
Succinite
Mineraloid
Fossil Shark Tooth (Sand Tiger or Mackerel Shark)
Carcharias sp. or Otodus sp. replaced by Hydroxylapatite/Calcium Carbonate
sedimentary
Aragonite (Star Cluster or Twinned variety)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Shungite
Non-crystalline carbon (allotrope of carbon)
metamorphic
Chert / Flint pebble
Microcrystalline quartz (SiO2)
sedimentary
Black Beach Pebble (Basalt / Slate Pebble)
Rounded Fine-Grained Clastic / Igneous Rock Pebble
sedimentary
Amber / Copal
Fossilized Tree Resin (Succinate)
Mineraloid
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Fossilized Shark Tooth
Lamniformes (order) fossil
fossil
Petrified Wood
Silicified wood (principally SiO2)
fossil
Petrified Wood
Silicified wood (Quartz/Chalcedony replacement of cellulose)
sedimentary
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
mineral
Black Flint
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Shale
Shale
sedimentary
Fossilized Vertebra
Chordata fossil (Vertebra)
fossil
Amber
Amber (Succinite), fossilized tree resin
Mineraloid
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2)
sedimentary
Amber (with potentially inclusions)
Succinite (Fossilized Tree Resin)
Mineraloid
Turquoise and Red Coral (with Grizzly Bear Claw)
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Precious Coral (Corallium rubrum)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Fossilized Shark Tooth
Elasmobranchii gen. sp. indet. (Calcium Phosphate - Ca5(PO4)3(OH,F,Cl))
fossil
Quartz River Pebble with Algae
Silicon Dioxide (SiO2) with organic biofilm
metamorphic or igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Chert (Flint)
Microcrystalline silica (SiO2)
sedimentary
Pyritized Ammonite
Ammonitida (replaced by Iron Disulfide, FeS2)
sedimentary
Pyrite (Fool's Gold) Cube
Iron Sulfide (FeS2)
mineral
Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary