Sedimentary (Jasper), Mineral (Aquamarine)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Limonite (Ironstone Concretion)

Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Sandstone

Arenite (composed primarily of SiO2)

Selenite (Gypsum)

Hydrous calcium sulfate (CaSO4·2H2O)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Quartzite-rich River Cobble)

Clastic sedimentary rock (primarily SiO2)

Sandstone (likely Fossiliferous Sandstone)

Clastic sedimentary rock (primarily SiO2)

Basalt with Caliche Crust

Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Bauxite

Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)

Sandstone with Foliose Lichen

Arenite (Rock matrix) with Xanthoparmelia or Flavoparmelia (Lichen genus)

Sandstone with Iron Oxide

Arenite (SiO2 with Fe2O3 staining)

Agatized Fossil (Druzy Agate)

Silicon Dioxide (SiO2) replacing organic matter

Brachiopod Fossil

Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)

Manganese Oxide Crust on Limestone

Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3

Rhodochrosite

Manganese carbonate (MnCO3)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (specifically Picture Sandstone or Wonderstone)

Arenite (composed primarily of SiO2)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Fossilized Shark Tooth (Otodus obliquus)

Otodus obliquus (Mineral composition: Bio-apatite/Calcium Phosphate replaced by various minerals)

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2)

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Limonite (Ironstone)

Limonite (Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O)

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock - Arenite

Sandstone

Arenite (primarily SiO2)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 based)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Limonite (Iron Ore)

Limonite (Hydrous ferric oxides), generic formula FeO(OH)·nH2O

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Satin Spar Gypsum

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Limonitic Sandstone (Stained Sandstone)

Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)