Sedimentary (Biogenic Sediment Or Biological Remain)

Weathered flint or chert fragment

Microcrystalline quartz (SiO₂), likely chert/flint

Fossiliferous Limestone (Gritstone/Marl)

CaCO3 (Calcium Carbonate) with Fossil Inclusions

Pearl

Biogenic Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Fossilized shark tooth

Fossil shark tooth; exact shark species cannot be determined from this image

Shark Tooth Fossil

Selachii fossil

Fossilized shell fragment

Indeterminate fossil mollusk; likely a silicified or mineral-replaced bivalve/gastropod fragment

Tumbled brown chert or jasper pebble

Microcrystalline quartz (SiO₂), likely chert/jasper

Fossil bivalve shell

Likely an internal mold or mineralized shell of a brachiopod or small bivalve; exact taxonomy requires locality and diagnostic details

Fossil shark tooth

Likely fossilized shark tooth, possibly *Carcharocles* or *Otodus* species

Fossiliferous limestone, likely coralline or stromatolitic

Biogenic limestone; predominantly calcite (CaCO₃)

Fossilized Crinoid Stem

Class Crinoidea (Echinodermata)

Chert or fine-grained slate-like stone

Microcrystalline quartz (SiO₂), possibly siliceous shale or slate

Ironstone Concretion

Ironstone (Limonite/Goethite Concretion)

Botryoidal calcite (likely calcite concretion)

Calcite, calcium carbonate (CaCO₃)

Weathered limestone fragment

Limestone, primarily calcite (CaCO₃)

Calcite (likely honey/orange calcite)

Calcite — calcium carbonate, CaCO₃

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)

Fossilized mammalian tooth fragment

Likely a fossil molar or premolar; exact taxon cannot be determined from the image

Possible fossil tooth or bone fragment

Indeterminate fossilized vertebrate material; species cannot be identified reliably from this image

Conical fossil shell or shell fragment

Likely a gastropod shell fragment; exact taxon indeterminate from the image

Fossil Shark Tooth (Otodus obliquus)

Otodus obliquus; hydroxyapatite (mineralized form Ca5(PO4)3(OH))

Fossil Shark Tooth

Odontaspididae (likely Carcharias sp.)

Fossilized tooth, likely a shark tooth

Fossil vertebrate tooth; exact taxon uncertain, possibly Otodus/Carcharodon-type

Fossilized gastropod shell

Fossil Mollusca, class Gastropoda; likely a mineral-replaced or partially silicified shell

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Fossiliferous Limestone with Brachiopod

Phylum Brachiopoda in Sedimentary Matrix (CaCO3)

Pearl oyster shell with cultured pearls

Mollusk shell (likely Pinctada spp.) containing aragonite pearls, CaCO₃

Fossilized bone

Petrified bone; commonly fossil vertebrate bone composed largely of hydroxyapatite and silica/calcite replacement minerals

Fossil Shark Tooth

Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth

Fossiliferous Limestone (Coquina)

Biogenic Limestone (Calcium Carbonate, CaCO3)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Fossilized Shark Tooth

Chondrichthyes (Class)

Banded chert or flint pebble

Microcrystalline quartz (SiO₂), likely chert/flint with pale silica bands

Polished fossil shell fragment

Fossilized bivalve or gastropod shell, likely calcitic/aragonitic carbonate

Fossil-bearing ironstone or weathered concretion

Indeterminate; likely ferruginous sandstone/concretion containing a partial fossil impression

Polished chert or jasper pebble

Microcrystalline quartz (SiO₂), likely chalcedony-rich chert/jasper

Fossil shark tooth

Likely fossilized shark tooth, possibly Carcharhinus or Otodus species

Fossilized Shark Tooth

Chondrichthyes (Class) fossilized tooth

Fossilized Brachiopod

Articulata (Class) / Brachiopoda (Phylum)

Porous limestone fragment

Calcite-rich limestone (CaCO₃), possibly bioclastic limestone

Limestone (Fossiliferous)

Sedimentary Carbonate Rock (CaCO3)

Chert (likely flint-bearing chert)

Microcrystalline quartz, SiO₂ (chalcedony/quartz aggregate)