Rounded river pebble, likely quartz-rich sandstone or quartzite
Indeterminate quartz-rich clast; predominantly SiO₂
sedimentary/metamorphic
Category
Mineral, Sediment
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Chert (Mudstone)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Siltstone or Mudstone
Clastic Sedimentary Rock (Siltstone/Argillite)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Conglomerate
Conglomerate (Clastic sedimentary rock)
sedimentary
Petrified Wood
Silicified wood (Quartz/Chalcedony)
Sedimentary
Limestone (Flagstone)
Fossiliferous Limestone (CaCO3)
sedimentary
Gravel and Pavement Aggregates
Unconsolidated rock fragments / detrital sediments
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
metamorphic
Fossil Shark Tooth
Chondrichthyes (class)
fossil
Fossil Shark Tooth
Odontaspididae (likely Carcharias sp.)
fossil
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Green Jasper
Silicon dioxide (SiO2)
sedimentary
Specular Hematite with Quartz
Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)
Mineral
Zebra Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Ammonite fossil
Ammonoidea; likely a polished small ammonite, possibly Cleoniceras
fossil
Petrified Wood
Silicified Wood (primarily quartz/chalcedony replacing organic wood structure)
fossil
Amber
Fossilized Tree Resin
gemstone
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Shark Tooth Fossil
Selachii fossil
fossil
Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
fossil
Lepidodendron fossil (Scale Tree Bark)
Lepidodendron (Lycophytina class)
sedimentary
Black Veined Jasper (Spiderweb Jasper)
Silicon Dioxide (SiO2)
sedimentary
Blue Schist / Lydian Stone / Chert with Glaucophane
Metamorphic rock containing quartz and glaucophane
metamorphic
Petrified Wood
Silicified wood (Quartz replacement)
fossil
Garnet
Almandine/Pyrope Garnet (Silicate Mineral Group)
mineral
Red Breccia Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Chert (with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Fuchsite
Chromian Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Biotite (Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Green Aventurine
SiO2 (Quartz with Fuchsite inclusions)
mineral
Polished brown flint/chert (likely)
Microcrystalline quartz, SiO₂ (chalcedonic flint/chert)
sedimentary
Likely weathered fossil shell or fossiliferous limestone
Indeterminate molluscan fossil, possibly a bivalve or brachiopod preserved in carbonate rock
fossil
Fossil coral fragment (probable)
Recrystallized fossil coral, commonly scleractinian or tabulate coral; exact identification requires magnification and locality
fossil
Fossil Shark Tooth
Selachii (fossilized dentition)
fossil
Fossil Coral
Rugose or Tabulate Coral Fossil (CaCO3 replacement)
fossil
Echinoid Fossil (Fossilized Sea Urchin)
Echinoidea
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Jasper with Quartz Veining
Silicon Dioxide (SiO2)
sedimentary