Mineral Like Biological Tissue

Fossiliferous limestone, possibly coral limestone

Calcite-rich carbonate rock; chiefly calcium carbonate (CaCO₃), with probable fossil coral or shell structures

Chert or fine-grained slate-like stone

Microcrystalline quartz (SiO₂), possibly siliceous shale or slate

Tumbled tan stone, likely calcite or limestone

Calcite (CaCO₃), possibly microcrystalline limestone

Sand Dollar Fossil (Echinoidea)

Class Echinoidea (likely order Clypeasteroida), CaCO3 (Calcite)

Brachiopod Fossil

Phylum Brachiopoda (replaced by Calcite or Silica)

Coral Skeleton (Scleractinia)

Aragonite (CaCO3) biomineralisation within Anthozoa

Fossilized Shark Tooth

Chondrichthyes (Class)

Polished fossil shell fragment

Fossilized bivalve or gastropod shell, likely calcitic/aragonitic carbonate

Banded Jasper

Silicon Dioxide (SiO2) with impurities

Fossiliferous Limestone Pebble

Limestone with fossil inclusion

Chert

Microcrystalline Quartz (SiO2)

Agatized fossil fragment, possibly silicified coral

Chalcedony (microcrystalline SiO₂) replacing carbonate fossil material

Crazy Lace Agate

Cryptocrystalline Quartz (Silicon Dioxide, SiO2)

Amber

Succinite (fossilized resin)

Fossil bivalve shell

Calcitic aragonitic bivalve mollusk shell; exact taxon cannot be determined from the image

Fossil shark tooth

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact identification requires a sharper, closer image

Fossil scallop shell

Bivalvia, likely family Pectinidae; exact species cannot be determined from the image

Hag Stone

Sandstone or Limestone with Solution Holes (Bioturbation/Erosion)

Fossilized oyster or other bivalve shell

Calcitic bioclast, commonly Ostrea spp. or Exogyra spp.

Likely calcite or limestone fragment

Calcite (CaCO₃), possibly limestone dominated by calcite

Shark Tooth Fossil

Selachii fossil

Fossilized shell or coral fragment

Indeterminate marine invertebrate fossil; possibly a worn brachiopod, bivalve, or solitary coral

Fossilized bivalve shell

Fossil Mollusca; likely a cemented or infaunal bivalve, possibly oyster or clam

Augite Shell / Turret Snail Fossil (or Recent Seashell)

Gastropoda (Class) / Turritellidae (Family)

Orange Calcite

Calcium Carbonate (CaCO3)

Fossilized shell or bone fragment

Indeterminate biogenic carbonate/phosphate fossil; likely a fragment of fossil shell or small vertebrate bone

Small weathered fossil or mineral fragment

Indeterminate; possibly fossilized shell, bone, or a pale carbonate mineral

Amber

Succinite (Fossilized Tree Resin)

Carved limestone architectural fragment

Limestone, predominantly calcite (CaCO₃), possibly weathered fossiliferous or oolitic limestone

Fossil shark tooth, likely sand tiger shark

Fossilized selachian tooth; possibly *Carcharias* or *Striatolamia*

Fossilized Shark Tooth (Fragment) in Matrix

Elasmobranchii (subclass)

Potassium-Rich Silicate Clay (inferred from biological context)

Phyllosilicate group (likely Illite or Smectite within surrounding soil substrate)

Amber

Succinicum (Succinite); C10H16O

Amber

Succinite (organic fossilized resin)

Petrified Wood

Silicified Wood (SiO2)

Conical fossil shell or shell fragment

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

Fossiliferous Limestone

Carbonate sedimentary rock (CaCO3)

Amber

Succinite (specifically for Baltic amber); C10H16O (Variable organic compound)

Seashell Fragment

Calcium carbonate (CaCO3) - primarily Aragonite or Calcite

Amber (Rough)

Succinite (Resinite)

Dinosaur Bone (Gembone)

Silicified Dinosaur Bone (SiO2 replacing organic tissue)

Fossilized shell or coral fragment

Likely silicified or calcitic marine invertebrate fossil; exact taxon indeterminate from the image