Sedimentary (Processed Mineral Product)

Quartz Veinated Sandstone or Siltstone

Silicon Dioxide (SiO2) within a clastic sedimentary matrix

Carnelian

Carnelian (SiO2 with Iron Oxide impurities)

Pyrite

Iron Disulfide (FeS2)

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Quartzite River Stone

Quartzite (primarily SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Quartzite-rich River Cobble)

Clastic sedimentary rock (primarily SiO2)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Limonite (Ironstone Concretion)

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

Red Jasper

Silicon Dioxide with Iron Oxide (SiO2)

Selenite (Gypsum)

Hydrous calcium sulfate (CaSO4·2H2O)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)

Sandstone with Foliose Lichen

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

Blue Apatite

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

Basalt with Caliche Crust

Aphanitic Mafic Igneous Rock with Calcium Carbonate (CaCO3) coating

Agatized Fossil (Druzy Agate)

Silicon Dioxide (SiO2) replacing organic matter

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Diamond

Carbon (C), specifically a solid form of the element carbon with atoms arranged in a crystal structure called diamond cubic.

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

Sandstone with Iron Oxide

Arenite (SiO2 with Fe2O3 staining)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2)

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Manganese Oxide Crust on Limestone

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

Sandstone (specifically Picture Sandstone or Wonderstone)

Arenite (composed primarily of SiO2)

Fossilized Shark Tooth (Otodus obliquus)

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

Lapis Lazuli

Lapis Lazuli (Complex aggregate of Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Pyrite, and Calcite)

Brachiopod Fossil

Phylum Brachiopoda (likely Order Rhynchonellida or Spiriferida)

Rhodochrosite

Manganese carbonate (MnCO3)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone

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

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Limonite (Ironstone)

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

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Chert (Mudstone)

Microcrystalline Quartz (SiO2)

Diamond

Diamond (C)

Pyrite

Iron Sulfide (FeS2)