Sedimentary (Primary) With Artificial Modification

Oolitic Limestone

Oolite (Sedimentary rock composed of CaCO3)

Lapis Lazuli

Lapis lazuli (primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Sandstone (with minor quartz and possible clay components)

Clastic Sedimentary Rock (SiO2 dominated)

Sandstone (Pebble)

Arenite (primarily SiO2)

Glauconitic Sandstone

Glauconitic Sandstone (Greensand)

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Sandstone Pebble

Arenite (primarily SiO2)

Weathered Sandstone with Algae Growth

Arenite

Sandstone (Ferruginous)

Arenite (SiO2 with Iron Oxide impurities)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Ferruginous Sandstone (Ironstone)

Sedimentary rock with Limonite/Goethite cement

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Sandstone

Sandstone (clastic sedimentary rock)

Sandstone (Pebble/Cobble)

Arenite (primarily SiO2)

Green Jasper

Silicon Dioxide (SiO2) with impurities

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (SiO2)

Bumblebee Jasper

Volcanic Tuff (mixture of Quartz, Sulfur, Hematite, and Orpiment)

Imperial Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions

Chert Nodule

Microcrystalline Quartz (SiO2)

Sandstone with Calcite Vein

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

Sandstone (with garnet granules)

Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)

Red Sandstone

Clastic sedimentary rock (primarily SiO2 with Fe2O3 iron oxide staining)

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Blue Kyanite

Kyanite (Al2SiO5)

Chert

Chert (Microcrystalline Quartz, SiO2)

Sandstone

Arenite (SiO2 principal)

Conglomerate

Conglomerate (SiO2 matrix with various inclusions)

Sandstone (Quartzite Pebble)

Arenite (primarily SiO2)

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Chalcedony)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (with Liesegang rings or Oxidation)

Arenite (primarily Quartz SiO2 with Iron Oxide Fe2O3 staining)

Ammonite Fossil

Ammonitida (Extinct subclass of Cephalopoda)

Coprolite

Fossilized feces (various taxa)

Chert (Jasper/River Stone)

Silicon dioxide (SiO2) - Microcrystalline quartz

Fossil Shell (Bivalve)

Phylum Mollusca, Class Bivalvia (typically composed of Calcium Carbonate / CaCO3)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Sandstone

Arenite (primarily SiO2)

Chert (Yellow/Tan)

Microcrystalline Quartz (SiO2)

Sandstone (Yellow/Siltstone variant)

Arenite (SiO2 primarily)