Petrified Wood
Silicified Wood (Per mineral content: SiO2, Quartz/Chalcedony)
fossil
Category
Mineral, Sediment
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Polished septarian nodule (likely)
Septarian calcite–aragonite nodule with iron-oxide-rich matrix
sedimentary
Fossil ammonite
Ammonite (subclass Ammonoidea; exact species not identifiable from the image)
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Red Jasper
Silicon Dioxide (SiO2) with Iron inclusions
sedimentary
Sandstone (Greywacke)
Arenite / Wacke (SiO2 + varied clasts)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Ferruginous Sandstone
Arenite with Iron Oxide cement (Fe2O3 / FeO(OH))
sedimentary
Banded Chert
Silicon dioxide (SiO2)
sedimentary
Sandstone Concretion
Sandstone (Sedimentary rock, mostly SiO2)
sedimentary
Small rounded pebble, likely basalt
Fine-grained mafic volcanic rock (likely basalt); image alone cannot confirm composition
igneous
Fossil coral limestone
Fossilized colonial coral, commonly tabulate or rugose coral, preserved in calcite (CaCO₃)
fossil
Red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Fossilized gastropod shell
Fossil Mollusca, class Gastropoda; likely a mineral-replaced or partially silicified shell
fossil
Fossilized Shark Tooth (Sand Tiger)
Carcharias taurus (fossil specimen)
sedimentary
Silty Shale
Silty Shale (Fissile Sedimentary Rock)
sedimentary
Shale or Siltstone
Fine-grained siliciclastic sedimentary rock
sedimentary
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
River Rock (likely Siltstone or fine-grained Sandstone)
Clastic Sedimentary Rock
sedimentary
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
sedimentary
Banded Sandstone / Siltstone
Sedimentary Rock (Quartzose Sandstone / Siltstone)
sedimentary
Quartz-veined Sandstone Pebble
Quartzite-veined Arenite
sedimentary
River Rock (Mossy)
Stream-rounded Clast (likely Siltstone or Sandstone with bryophytes)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
fossil
Petrified Wood
Agatized or Silicified Wood (SiO2)
fossil
Banded chert pebble
Chert (microcrystalline quartz, SiO₂), likely ribbon-banded chert
sedimentary
Petrified Wood
Agatized or Silicified Wood (SiO2)
fossil
Cream River Jasper
Silicified microcrystalline quartz (SiO2)
sedimentary
Tumbled chert (likely jasper-bearing chert)
Microcrystalline quartz; SiO₂ (chalcedony/chert)
sedimentary
Fossil shark tooth
Likely fossilized shark tooth, possibly Carcharhinus or a related requiem shark
fossil
Iron-rich concretion or weathered ironstone
Goethite–hematite-rich limonite (FeO(OH)·nH₂O / Fe₂O₃)
sedimentary
Weathered iron-rich chert or jasper
Microcrystalline quartz (SiO₂), variably stained by iron oxides
sedimentary
Fossilized echinoid (sea urchin), likely a sand dollar fragment or small regular urchin
Echinodermata; commonly Clypeasteroida or Echinoida, preserved mainly as calcite (CaCO₃)
fossil
Weathered banded iron formation (iron-rich quartzite)
Banded iron formation (BIF), chiefly hematite/magnetite and microcrystalline quartz (SiO₂)
sedimentary
Likely weathered iron-rich stone or concretion
Indeterminate; possibly ferruginous sandstone, ironstone, or a weathered sedimentary concretion
sedimentary
Mixed Crushed Stone
Aggregate (varied mineral composition)
igneous and sedimentary mixture
Polished red jasper
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
mineral
Fossil Shark Tooth
Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth
sedimentary
Concretion (likely iron-rich sandstone or claystone concretion)
Diagenetic carbonate/iron-oxide concretion; exact mineralogy requires testing
sedimentary
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
sedimentary