Sedimentary

Dalmatian Stone (often misnamed Dalmatian Jasper)

Aplite (with hornblende/arfvedsonite inclusions)

Sandstone (with potential iron-oxide weathering)

Arenite (SiO2 based)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Sandstone

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

Stromatolite

Laminated biogenic sedimentary structure (formed by Cyanobacteria)

Sandstone (Quartzose)

Arenite (Formula: SiO2 primary, with various cements)

Sandstone

Arenite (primarily SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxides

Chert / Jasper

Microcrystalline Quartz (SiO2)

Sandstone (Flagstone)

Arenite (composed primarily of SiO2)

Sandstone with Calcite Vein

Clastic sedimentary rock (primarily SiO2) with Calcium Carbonate (CaCO3) infilling

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Sandstone (River Rock)

Arenite (composed primarily of SiO2)

Sandstone

Arenite (primarily SiO2)

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Sandstone

Arenite (composed primarily of Quartz: SiO2)

Fossil Coral

Coral Limestone (a type of biogenic sedimentary rock)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3)

Travertine

Terrestrial Sedimentary Form of Calcium Carbonate (CaCO3)

River Cobble (Quartzite-rich Sandstone)

Clastic Sedimentary Rock (Litharenite/Quartzite transition)

Fossiliferous Limestone with Crinoid stems

Calcite-rich Biogenic Sedimentary Rock (CaCO3)

Oolitic Ironstone

Sedimentary Ooidal Ironstone (Limonite/Hematite mixture)

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Stromatolite

Biogenic Sedimentary Rock (Lithified microbial mat)

Chalk (Calcitic)

Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock

Chert (variations include Flint or Jasper)

Chert (chemical sedimentary rock), Quartz (SiO2)

Conglomerate

Clastic Sedimentary Conglomerate (SiO2, CaCO3, etc.)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Ironstone (likely Ferruginous Siltstone/Sandstone)

Ferruginous sedimentary rock (FeOx-rich clastic)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Brecciated Chert

Sedimentary Chert (SiO2) with Calc-Silicate mineralization

Microcrystalline Limestone Pebble

Carbonate sedimentary rock (Calcium Carbonate, CaCO3)

Sandstone (Iron-stained)

Clastic sedimentary rock (SiO2 with Fe2O3 staining)

Shale

Fissile Mudrock (Clay-rich Sedimentary Rock)

Sandstone (Gneissic or Banded)

Clastic Sedimentary Rock (composed predominantly of SiO2)

Fossiliferous Limestone

Calcite (CaCO3) Rich Bio-sedimentary Rock

Sandstone (Banded)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Anthracite Coal

Anthracite (Carbon-rich metamorphic sedimentary rock)

Red Sandstone (Hematitic)

Clastic sedimentary rock (SiO2 with Fe2O3 inclusions)