Sedimentary Rock (Specifically A Clastic Sedimentary Rock Formed Into A Cobble)

Sandstone (Quartzose)

Arenite (SiO2 based)

Chert (White-Tan variety)

Silicon dioxide (SiO2) / Microcrystalline Quartz

Green Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Sandstone (Ferruginous)

Arenite (with iron oxide cement)

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

Sandstone

Arenite (SiO2 principal)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with iron oxide cement)

Arkosic Sandstone (or Conglomeritic Sandstone fragment)

Arkose (rich in feldspar)

Carnelian and White Quartz Bracelet

Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Jasper and Quartz River Cobble

Silicon Dioxide (SiO2) with Hematite inclusions

Sandstone (Micaceous)

Arenite (primarily SiO2 with Phyllosilicates)

Limonitic Sandstone (Stained Sandstone)

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

Sandstone

Arenite (primarily SiO2)

Sandstone

Arenite (primarily SiO2)

Chert (specifically Pink/Tan Chert)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Milky Quartz Geode or Druzy Quartz

Silicon Dioxide (SiO2)

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz)

Sandstone

Arenite (SiO2 principal component)

Sandstone

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)

Sandstone

Arenite (composed primarily of SiO2)

Ferruginous Sandstone

Arenite with Hematite/Limonite cement

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Sandstone (Picture Sandstone)

Sandstone (primarily Quartz with Iron Oxide impurities)

Fossiliferous Shale Matrix

Clastic Sedimentary Rock with Brachiopod or Mollusk shell fragments

Sandstone with Iron Concretion

Arenite with Limonite/Goethite Concretion

Dendritic Agate (specifically Orange/Tumbled)

Silicon Dioxide (SiO2) with Oxide Inclusions

Sandstone

Arenite (SiO2 based with quartz, feldspar, or lithic fragments)

Chert (and Limestone) River Cobble

Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)

Sandstone (Weathered)

Arenite (primarily SiO2)

Yellow Jasper

Jasper (Silicon Dioxide, SiO2)

Sandstone (likely River-tumbled Picture Sandstone)

Arenite (predominantly SiO2 with iron oxide impurities)

Red Sandstone (Iron-rich Sandstone)

Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement

Manganese-coated Sandstone

Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Yellow Jasper

Cryptocrystalline quartz (SiO2) with iron inclusions

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)