Brachiopod Fossil in Chert
Phylum Brachiopoda within Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Fossilized Organic Remain)
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Limestone Pebble with Crinoid Fossil
Calcium Carbonate (CaCO3) - Fossiliferous Limestone
sedimentary
Ammonite Fossil
Ammonoidea (subclass)
sedimentary
Rounded basalt cobble
Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with minor olivine and iron oxides
igneous
Amber
Fossilized tree resin (C10H16O)
gemstone
Amber
Fossilized tree resin (Amorphous)
gemstone
Amber
Fossilized tree resin (C10H16O)
gemstone
Amber (Sumatran / Indonesian Red Blue)
Succinum (Fossilized Tree Resin)
fossil
Amber
Succinite (Fossilized Tree Resin)
mineral
Amber
Succinite (fossilized resin, C10H16O)
mineral
Quartzite Pebble
Quartzite
metamorphic
Quartzite River Pebble
Quartzite (mostly SiO2)
metamorphic
River Quartzite (River Stone)
Quartzite (primarily SiO2)
metamorphic
Quartzite with Iron Staining
Silicon Dioxide (SiO2) with Fe2O3 impurities
metamorphic
Fulgurite
Fulgurite (Lechatelierite/Silica glass)
mineral
Dendritic Quartz
Silicon Dioxide with inclusions (SiO2)
mineral
Bivalve Fossil (Clam)
Class Bivalvia (Calcium Carbonate, CaCO3)
sedimentary
Fossilized bone, likely a tooth or jaw fragment
Mineralized vertebrate bone; taxonomic identification requires clearer diagnostic anatomy
fossil
Mookaite Jasper
Radiolarite (Silica-rich sedimentary rock featuring Hematite and Goethite)
sedimentary
Fossil Shark Tooth (embedded in matrix)
Lamniformes (likely Cretalamna or Squalicorax) within phosphatic/calcareous matrix
sedimentary
Fulgurite
Fulgurite (Lechatelierite-rich variety)
metamorphic
Conglomerate with Fossilized Shark Teeth
Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains
sedimentary
Porphyritic Basalt
Porphyritic Basalt
igneous
Quartzite Pebble
Quartzite (mostly SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Metamorphosed Quartz Sandstone
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite Pebbles
Quartzite (SiO2)
metamorphic
Amber
Fossilized Tree Resin (Succinite)
mineraloid
Amber (Baltic)
Succinith (Fossilized Tree Resin)
mineraloid
Fossil Shark Tooth
Odontaspididae (Sand Tiger Shark family)
fossil
Ironstone concretion / Limonitic Sandstone
Goethite/Hematite Cemented Sandstone (Hydrated Iron Oxide)
sedimentary
Echinoid Fossil (Fossilized Sea Urchin)
Echinoidea
fossil
Brachiopod Fossil
Phylum Brachiopoda
fossil
Turritella Agate / Fossiliferous Limestone
Elimia tenera in Chalcedony/Calcite Matrix
fossil
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Coral Fossil (Favosites)
Favosites (Calcite/Calcium Carbonate, CaCO3)
sedimentary
Fossil Coral (Petoskey Stone / Rugose Coral)
Hexagonaria percarinata (Order: Rugosa, Fossilized Calcium Carbonate CaCO3)
sedimentary
Petoskey Stone
Hexagonaria percarinata
fossil
Pyrite
Iron Sulfide (FeS2)
mineral
Gastropod shell fragment
Calcareous mollusk shell; primarily aragonite or calcite (CaCO₃)
fossil
Bivalve Fossil
Bivalvia (Phylum Mollusca)
Fossil