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

Fossil Coral

Scleractinia (fossilized calcium carbonate)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide staining)

Sandstone (Quartzose)

Arenite (SiO2 principal)

Sandstone (Green/Yellow Siltstone variant)

Arenite or Siltstone (primarily SiO2 with mineral staining)

Sandstone (Weathered Pebble)

Arenite (primarily SiO2)

Chert (Nodular or Massive Variety)

Cryptocrystalline Quartz (SiO2)

Breciated Limestone with Calcite Veins

Sedimentary Breccia (CaCO3)

Sandstone Concretion with Quartz Center

Sedimentary Clastic Rock (SiO2 matrix with Quartz core)

Sandstone (Yellow/Tan Sandstone)

Arenite (primarily Quartz, SiO2)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Sandstone

Arenite (composed primarily of SiO2)

Quartzite River Rock (with Limonite staining)

Quartzite (SiO2)

Sandstone (with Feldspathic/Arkose qualities)

Arenite (primarily SiO2 with KAlSi3O8 components)

Ferruginous Sandstone (Gozzan/Ironstone)

Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)

Sandstone (Quartz Arenite)

Sandstone (SiO2 with possible mineral cements)

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Sandstone

Arenite (composed primarily of SiO2)

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite (composed primarily of SiO2)

Agate (specifically Chalcedony nodule)

Silicon Dioxide (SiO2)

Sandstone

Arenite

Agate (Grey Agate Slice)

Microcrystalline Quartz (SiO2)

Chert (specifically Jasper/Flint)

Microcrystalline Quartz (SiO2)

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Sandstone

Arenicola (comprising mostly Quartz, SiO2)

Chert / Flint Nodules in Sandstone

Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock

Painted Pet Rock (Quartzite/Sandstone base)

Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Ferruginous Sandstone (Ironstone)

Sedimentary rock with high iron oxide content (Fe2O3 / FeO(OH))

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 principal component)

Chert (specifically Flint or Jasper variant)

Microcrystalline Quartz (SiO2)

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)

Chert (specifically Yellow Jasper)

Sedimentary Cryptocrystalline Quartz (SiO2)

Sandstone

Arenite

Sandstone

Arenite (composed primarily of SiO2, or Silicon Dioxide)

Sandstone

Arenite (primarily SiO2)

Fossiliferous Limestone with Crinoid stems

Calcite-rich Biogenic Sedimentary Rock (CaCO3)

Sandstone

Arenite (primarily SiO2 - Silicon Dioxide)