Fossilized Shark Tooth
Bioapatite (Calcium Hydroxyapatite) replacement
mineral
Category
Mineralized Fossil
Browse mineralized fossil specimens identified by the Rock Identifier community.
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Calligraphy Stone
Mariam Jasper (Fossiliferous Limestone with Hematite and Iron)
sedimentary
Fossil Brachiopod
Phylum Brachiopoda
fossil
Starfish Fossil
Asteroidea fossil
fossil
Fossiliferous Limestone
Biogenic Limestone with Brachiopod/Crinoid fragments
sedimentary
Shark Tooth Fossil
Carcharocles megalodon or similar extinct shark tooth
fossil
Polished fossiliferous limestone
Bioclastic limestone, commonly crinoidal or shell-rich micrite
sedimentary
Fossil Snail
Gastropoda fossil
fossil
Seashell Fossil
Gastropoda fossil
fossil
Gossan (Iron Hat)
Goethite-Hematite rich weathered rock (Fe-hydroxides)
sedimentary
Limonite (Iron Ore/Bog Iron)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Shark Tooth Fossil
Selachii fossil
fossil
Polished fossil-bearing limestone
Fossiliferous micritic limestone, likely containing gastropod or ammonoid fragments
fossil
Tooth or bone fragment (likely animal tooth)
Indeterminate vertebrate tooth; possibly a small mammal or fish tooth
fossil
Ironstone Concretion
Ironstone (primarily Siderite or Limonite)
sedimentary
Fossiliferous limestone with a fossil sea urchin
Bioclastic limestone containing an echinoid fossil (class Echinoidea)
sedimentary
Geode
Quartz / Chalcedony nodule with mineralized cavity
sedimentary
Fossiliferous shale or slate with plant impressions
Carbonaceous mudstone/shale; possible fossil plant material (often fern-like impressions)
fossil
Fossil coral or stromatoporoid fragment
Likely fossilized colonial coral; exact taxon indeterminate from image
fossil
Red Jasper
Jasper (Silicon Dioxide) - SiO2
sedimentary
Druzy quartz (quartz-lined rock fragment)
Quartz, SiO₂; likely a druzy coating on a host rock
mineral
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Fossiliferous limestone
Bioclastic limestone, predominantly calcite (CaCO₃)
sedimentary
Fossiliferous limestone pebble
Bioclastic limestone, primarily calcite (CaCO₃)
sedimentary
Light-colored carbonate pebble, likely limestone
Limestone; predominantly calcite (CaCO₃), possibly micritic or fossiliferous
sedimentary
Small metallic-looking rock fragment
Uncertain; possibly galena-bearing ore or mica-rich schist
mineral
Fossiliferous Limestone
Bioclastic Limestone
sedimentary
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Fossilized belemnite guard (likely)
Belemnitella or related belemnite; fossil calcite (CaCO₃)
fossil
Weathered fossil shell fragment
Likely a bivalve or gastropod shell, composed mainly of biogenic calcite/aragonite (CaCO₃)
fossil
Fossiliferous limestone
Bioclastic limestone, chiefly calcite (CaCO₃)
sedimentary
Fossilized bivalve shell fragment
Pectinid or related scallop bivalve; shell originally composed mainly of calcite (CaCO₃)
fossil
Fossilized Gastropod in Limestone
Gastropoda (Class) in Fossiliferous Limestone
sedimentary
Fossilized Echinoid (Sea Urchin)
Echinoidea (Fossil)
sedimentary
Iron-stained quartz-rich rock, likely quartzite or silicified breccia
Quartz (SiO₂), possibly quartzite with limonite/goethite iron oxides
metamorphic
Fossil-bearing limestone, likely coral or shell limestone
Bioclastic calcarenite/calcirudite; predominantly calcium carbonate (CaCO₃), commonly calcite
fossil
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Fossilized Coral (Petrified Coral)
Anthozoa fossil
fossil
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
mineral
Fossilized Vertebra
Chordata fossil (Vertebra)
fossil
Polished fossiliferous limestone, likely crinoidal or coral limestone
Calcite (CaCO₃), fossiliferous carbonate rock
fossil
Horn Coral (Rugose Coral)
Order Rugosa (extinct)
fossil