Sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert / Flint

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone

Arenite (primarily SiO2)

Banded Iron Formation (BIF) / Iron Ore

Hematite-Magnetite BIF (Fe2O3 / Fe3O4 mixed with SiO2)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Moqui Marble (Iron Concretion)

Iron Oxide Concretion (Goethite/Hematite Cemented Sandstone)

Petrified Wood

Silicified Wood (SiO2)

Jasper (Red/Brown Variety)

Jasper (Microcrystalline Quartz, SiO2)

Chert (variations include Flint)

Chert (Silicon Dioxide, SiO2)

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Red Jasper

Jasper (Silica with Iron Oxide inclusions), SiO2

Chert (specifically Blue or Grey Chert/Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (specifically Gray/Black Chert)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Chert (variations include Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Nodule)

Chert (primarily Microcrystalline Quartz - SiO2)

Laterite

Lateritic Soil/Rock (rich in Fe2O3 and Al2O3)

Coquina

Bioclastic Limestone

Limestone with Calcite Veins

Calcium Carbonate (CaCO3)

Coquina

Bioclastic Limestone (Coquina)

Biggs Jasper (Picture Jasper)

Silicon Dioxide (SiO2) - Opaque Silicified Volcanic Ash

Fossil Coral (Honeycomb Coral)

Favosites (extinct genus of Tabulate coral)

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Red Jasper (Heliotrope family variant)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Chert (Yellow/Tan Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Ocean Jasper

Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Ferruginous Sandstone (Gozzanous)

SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating

Grey Limestone Pebble

Limestone (Calcium Carbonate - CaCO3)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide)

Greywacke

Lithic Sandstone (Greywacke - (SiO2+Al2O3+Fe2O3))

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite or Iron Oxide inclusions

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Nodule)

Microcrystalline Quartz (SiO2)

Asphalt (Bituminous pavement fragment)

Artificial conglomerate / Bitumen-Aggregate mixture

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Chert (Nodule)

Microcrystalline or Cryptocrystalline Silica (SiO2)

Red Sandstone

Arenite (with Iron Oxide / Hematite cementation)

Chert (Jasper/Chalcedony)

Microcrystalline Silica (SiO2)

Moqui Marble (Iron-Oxide Concretion)

Iron Oxide Concretion (Fe2O3)

Chert (Cherty Flint/Jasper variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Green variety)

Chert (Silicon Dioxide, SiO2)