Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Category
Sedimentary (Fossilized Organic Matter)
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Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Hexagonaria (Petoskey Stone)
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary
Small white mineral fragment
Indeterminate; possibly quartz, calcite, or feldspar
mineral
Fossilized Coral (Rugose or Tabulate) or Stromatolite
Phylum Cnidaria / Stromatolithus
fossil
Fossiliferous Limestone Pebble
Biogenic Sedimentary Rock (CaCO3)
fossil
Anthracite Coal
High-rank coal (primarily Carbon, C)
metamorphic
Oyster shell fragment
Ostreidae shell; primarily calcite (CaCO₃)
fossil
Jet
Lignite (Anthracite-grade compact coal)
sedimentary
Fossilized Gastropod Shell
Gastropoda (Class) replacement / internal cast (steinkern)
fossil
Fossilized Shark Tooth
Elasmobranchii (Class) fossil
fossil
Picture Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Petoskey Stone
Hexagonaria percarinata
sedimentary
Biggs Jasper (Picture Jasper)
Silicon Dioxide (SiO2) - Opaque Silicified Volcanic Ash
sedimentary
Mookaite Jasper
Silicon Dioxide (SiO2) - variety of Chert/Jasper
sedimentary
Fossil Snail Shell (Embedded in Resin)
Gastropoda fossil
fossil
Ironstone Concretion (Coprolite-like)
Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))
sedimentary
Fossilized Bone Fragment
Permineralized Skeletal Element (Likely Vertebrate)
sedimentary
Travertine (used in construction, not a 'specimen' in situ)
Travertine
Sedimentary
Fossilized Bone Chunk
Permineralized Vertebrate Bone (indeterminant)
fossil
Amber
Succinite
Mineraloid
Fossilized Tabulate Coral
Favosites (Honeycomb Coral)
fossil
Dinosaur Fossil (Tyrannosaurus rex skull replica/specimen)
Tyrannosaurus rex (fossilized in permineralized sedimentary matrix)
sedimentary
Fossilized Fish (Lepidotes)
Lepidotes sp. (Order: Lepisosteiformes)
sedimentary
Augite Shell / Turret Snail Fossil (or Recent Seashell)
Gastropoda (Class) / Turritellidae (Family)
fossil
Fossilized Horse Tooth
Equus ferus caballus (fossilized molar/premolar)
fossil
Seashell Fossil
Mollusca (Bivalvia)
fossil
Likely tumbled amber or orange chalcedony
Uncertain from image; possibly amber (fossilized resin, chiefly C10H16O) or carnelian (microcrystalline quartz, SiO₂)
gemstone
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata (Calcium Carbonate, CaCO3)
sedimentary
Tufa (Vesicular Limestone)
Tufa (form of Calcium Carbonate, CaCO3)
sedimentary
Crinoid Stem Fossil
Crinoid columnal (Class Crinoidea)
sedimentary
Crinoid Stem Fossil (in Chert or Limestone Matrix)
Crinoidea (Class) - Calcium Carbonate (CaCO3)
sedimentary
Septarian Nodule (Dragon Stone)
Septarian concretion (composition: Calcium Carbonate / Calcite, Aragonite, and Limestone/Clay)
sedimentary
Fossilized Horn Coral
Order Rugosa (Calcium Carbonate - CaCO3)
sedimentary
Fossilized Gastropod in Limestone
Gastropoda (Class) in Calcium Carbonate (CaCO3)
sedimentary
Trilobite Pygidium (Tail Segment)
Phylum Arthropoda, Class Trilobita (likely order Phacopida)
sedimentary (fossil)
Petoskey Stone
Hexagonaria percarinata (Fossilized Rugose Coral)
sedimentary (fossilized)
Petoskey Stone (Fossilized Rugose Coral)
Hexagonaria percarinata
sedimentary
Murex Fossil
Muricidae (Calcium Carbonate fossilization)
fossil
Anthracite Coal
Anthracite (Metamorphosed Coal)
sedimentary
Asphalt (Bituminous Slate/Sandstone)
Asphaltum / Bituminous Rock
sedimentary