Fossiliferous limestone (likely ammonite/gastropod-bearing)
Bioclastic limestone; predominantly calcite (CaCO₃)
sedimentary
Category
Non Geological
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Quartzite
Quartzite (SiO2)
metamorphic
Puddingstone (Gowganda Conglomerate)
Polymictic Conglomerate (SiO2 matrix with jasper and quartz inclusions)
sedimentary
Gold (Elemental Metal)
Gold (Au)
Mineral
Shale fragment
Shale (clay mineral rich sedimentary rock)
sedimentary
Fossilized Ripple Marks or Stromatolite
Sedimentary ripple mark imprint / Biosedimentary structure
fossil
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Ferruginous Sandstone (SiO2 with Iron Oxide)
sedimentary
Chalky Limestone
Carbonate sedimentary rock (CaCO3)
sedimentary
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz (Raw Specimen)
Silicon Dioxide (SiO2)
mineral
Quartz (Pink / Ferruginous)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Pink/Rose Quartz or Quartz Crystal)
Silicon Dioxide (SiO2)
mineral
Moonstone
Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group
Mineral
Basalt with Jasper Vein
Extrusive Igneous Rock with Quartz/Chalcedony Vein
igneous
Quartz Vein in Basalt or Porphyry
Silicate-veined volcanic rock
igneous
Fossil Coral
Phylum Cnidaria / Scleractinia
fossil
Quartz-Veined Gneiss or Metamorphic Rock with Quartz Veins
Quartz-veined metamorphic rock (Silicate mineral assemblage)
metamorphic
Cowrie Shell Fossil
Cypraea sp.
fossil
Banded Igneous Dike Rock
Intrusive igneous rock with felsic/mafic banding
igneous
Fossilized Shell Impression / Siltstone Fossil
Bivalvia / Brachiopoda mold in Siltstone
fossil
Limestone with Fossil Fragment
Sedimentary carbonate rock (CaCO3)
sedimentary
Common Pebble / Sedimentary Rock Fragment
Lithified clastic sediment
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz pebble (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble with Pyrite Coating
SiO2 (Quartz) with FeS2 (Pyrite) inclusions or surface coating
metamorphic
Quartz (or Chalcedony) Specimen
Silicon Dioxide (SiO2)
mineral
Glendonite (Calcite Pseudomorph after Ikaite)
Calcite (CaCO3) pseudomorph after Ikaite (CaCO3·6H2O)
mineral
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Boji Stone (Pop Rocks or Moqui Marbles)
Iron-manganese oxide concretion (Goethite/Hematite/Jarosite)
sedimentary
Sandstone Pebble (Ventifact)
Arenite (mostly SiO2)
sedimentary
Iron-Stained Quartz (Quartzite / Chert)
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
mineral
Chalcedony with Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Coral Fossil (Hexagonaria)
Hexagonaria sp. (Silica-replaced)
fossil
Fossilized Rugose Coral (Horn Coral)
Order Rugosa
fossil
Petrified Wood
Silicified Wood (primarily SiO2)
fossil
Porphyritic Basalt
Porphyritic Basalt with Olivine phenocrysts
igneous
Petrified Wood
Silicified Wood (SiO2)
mineral
Sandstone with Ironstone Banding
Clastic Sandstone (composed of Quartz with Hematite/Limonite bonding)
sedimentary