Sedimentary (Synthetic)

Limestone

Calcium Carbonate (CaCO3)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Sandstone (Greywacke/Lithic Sandstone)

Arenite (composed primarily of SiO2)

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Sandstone

Arenite (SiO2 based)

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 (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)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Fairburn Agate / Agate-bearing Breccia

Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Red Sandstone)

Arenite (SiO2 based with Fe2O3 staining)

Coal (Bituminous)

Organic sedimentary rock primarily consisting of carbon (C)

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Sandstone (Ferruginous)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Sandstone with Magnetite and Iron Staining

Clastic Sedimentary Rock (contains Fe3O4 and Limonite/Hematite)

Chert / Flint Nodules in Sandstone

Microcrystalline Quartz (SiO2) within Clastic Sedimentary Rock

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

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)

Ferruginous Sandstone (Gozzan)

Iron-rich clastic sedimentary rock with Limonite/Goethite

Sandstone

Arenite (Siliclastic sedimentary rock), SiO2 + various minerals

Conglomerate with Fossilized Shark Teeth

Clastic sedimentary rock (Conglomerate) containing Elasmobranchii remains

Siltstone with flute casts or scratch marks

Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)

Coquina / Limonite-stained Limestone

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

Hag Stone

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

Sandstone Pebble with Iron Staining

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)

Banded Sandstone (River Pebble)

Clastic Sedimentary Rock (primarily Quartzite and Feldspar grains)

Sandstone (Red Sandstone)

Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)

Limestone

Calcium Carbonate (CaCO3)

Ferruginous Chert

Silicon dioxide with iron oxide impurities (SiO2 + Fe2O3)

Chert (with Limestone/Dolomite host)

Microcrystalline Quartz (SiO2)

Shale

Fissile Mudstone (primarily composed of clay minerals and quartz grains)

Sandstone (likely Fossiliferous)

Arenite / Fossiliferous Sandstone (SiO2 composition)

Red Sandstone

Arenite (primarily SiO2 with Fe2O3)