Petrified Wood
Silicified Wood (SiO2)
sedimentary
Category
Mineral, Sediment
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Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Fossilized bivalve shell
Bivalvia (likely a venerid or similar clam); shell composed mainly of CaCO₃ as aragonite/calcite
fossil
Banded Chert
Microcrystalline Quartz (SiO2)
sedimentary
Septarian Nodule (or Mudstone with Septarian Cracking)
Septarian Concretion (Composition: Calcite, Aragonite, and Limestone/Claystone)
sedimentary
Fossil shark teeth
Probably fossilized shark teeth, possibly *Otodus* or *Carcharhinus* species
fossil
Schist
Mica schist, likely muscovite–biotite schist with quartz and feldspar
metamorphic
Iron-rich chert or jasper pebble
Microcrystalline quartz (SiO₂), colored by iron oxides
sedimentary
Jasper
Silicon Dioxide (SiO2) microcrystalline quartz
sedimentary
Petrified Wood
Silicified wood (SiO2)
sedimentary
Fossilized Shark Tooth
Elasmobranchii dentition (calcium phosphate / hydroxyapatite)
fossil
Quartz-veined Jasper
Microcrystalline quartz (SiO2) with quartz veins
sedimentary
Blue Quartz (specifically Dumortierite Quartzite)
Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)
metamorphic
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Gravelly, weathered sediment (likely glacial till)
Unconsolidated diamicton; mixed lithologies, commonly including quartz, feldspar, and weathered silicate rock fragments
sedimentary
Weathered limestone or calcareous concretion
Calcite-rich carbonate rock; primarily calcium carbonate (CaCO₃), commonly calcite
sedimentary
Garnet (Almandine)
Fe3Al2(SiO4)3
mineral
Blue Quartz (Dumortierite Quartz)
Silicon Dioxide (SiO2) with inclusions of Dumortierite (Al7BO3(SiO4)3O3)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Tumbled red jasper
Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
Sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
fossil
Fossil Sea Urchin (Echinoid)
Echinoidea fossil (often replaced by silica or calcite)
fossil
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Mineral (variety of Chalcedony/Quartz)
Gastropod Steinkern (Fossil Snail Internal Mold)
Class Gastropoda (Internal Mold)
sedimentary
Petrified Wood
Silicified wood, primarily composed of Quartz (SiO2)
Mineral, often found in sedimentary deposits
Worn quartz-rich pebble, likely chert or quartzite
Microcrystalline quartz (SiO₂), possibly quartzite
sedimentary or metamorphic
Argillite
Argillite (Fine-grained sedimentary rock composed mostly of clay-sized particles)
sedimentary
Pebble (likely Siltstone or fine-grained Sandstone)
Sedimentary Clastic Rock
sedimentary
Green Chert
Chert (Cryptocrystalline Quartz, SiO2)
sedimentary
Basalt
Basalt (dominated by plagioclase feldspar, pyroxene, and olivine)
igneous
Siltstone with Quartz Vein
Siltstone (composed of Quartz and Clay minerals) with a hydrothermal Quartz vein (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Howlite
Howlite, Ca₂B₅SiO₉(OH)₅
mineral
Pyrite in Shale
Iron Disulfide (FeS2) in Sedimentary Shale
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Fossil Sand Dollar (Echinoidea)
Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)
sedimentary