Sedimentary (Or Mineraloid)

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Conglomerate

Conglomerate (SiO2 matrix with various silicate clasts)

Limestone (Weathered)

Calcium Carbonate (CaCO3)

Limonitic Sandstone (Stained Sandstone)

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

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Fairburn Agate / Agate-bearing Breccia

Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix

Sandstone (Ferruginous)

Arenite (Fe2O3 staining)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 principal component)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 based)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Ferruginous Sandstone (Gozzan)

Iron-rich clastic sedimentary rock with Limonite/Goethite

Chert / Flint Nodules in Sandstone

Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Banded Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (SiO2 with Iron Oxide impurities)

Ferruginous Sandstone (Ironstone Conglomerate fragments)

Ferruginous clastic sedimentary rock (SiO2 cemented by Fe2O3)

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Siltstone with flute casts or scratch marks

Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

Sandstone

Arenite (Siliclastic sedimentary rock), SiO2 + various minerals

Banded Sandstone (River Pebble)

Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)

Sandstone Pebble with Iron Staining

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Coquina / Limonite-stained Limestone

Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)

Hag Stone

Calcareous sedimentary rock (often Chert, Flint, or Limestone)

Fluorite

Calcium Fluoride (CaF2)

Marble

Recrystallized Calcite (CaCO3)

Jasper

Silicon dioxide (SiO2) with impurities

Quartz (Chert/Chunky Chalcedony)

Silicon Dioxide (SiO2)

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

Ruby in Kyanite

Corundum in Disthene (Al2SiO5 + Al2O3)

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

Chert (Flint)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Quartz Mineral

Silicon Dioxide (SiO2)

Carnelian (Red Agate)

Chalcedony (SiO2 with Iron Oxide impurities)

Orange Calcite (Mexican Onyx)

Calcium Carbonate (CaCO3)

Quartz (Variety: Citrine or Tumbled Chalcedony)

Silicon Dioxide (SiO2)