Sedimentary Rock (Specifically A Concretion Or Possibly A Geode)

Sandstone (Ferruginous)

Arenite with Iron-oxide inclusions (SiO2 primarily)

Sandstone

Arenite (composed primarily of SiO2)

Limonite (Iron-rich Siltstone / Sandstone base)

Hydrous ferric oxide mixture (FeO(OH)·nH2O)

Sandstone (Ferruginous)

Arenite (Fe2O3 enriched)

André's Landing Rock (Sandstone Boulder)

Newark Supergroup Sandstone (likely Stockton Formation)

Pyrite in Shale

Iron Disulfide (FeS2) in Argillaceous Shale

Chert (and Flint variant)

Microcrystalline Quartz (SiO2)

Chert (often called Flint or Jasper)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Quartz Vein in River Siltstone

Crystalline Quartz (SiO2) in Siliclastic Matrix

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Greywacke/Siltstone variant)

Clastic Sedimentary Rock (composed primarily of Quartz SiO2 and Feldspar)

Sandstone

Arenite (composed primarily of SiO2)

Dalmatian Stone (commonly Dyed)

Dalmatian Jasper (Peralkaline igneous rock)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Basalt

Basalt (Fine-grained extrusive igneous rock)

Sandstone

Arenite (composed primarily of SiO2)

Basalt

Basalt (Aphanitic Mafic Volcanic Rock)

Granite

Intrusive Phaneritic Felsic Igneous Rock

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Sandstone

Arenite (primarily SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Red Sandstone (Arkose)

Clastic Sedimentary Rock (Lithic Arkose)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Dalmatian Stone (Dalmatian Jasper)

Dalmatian Stone (A variety of Perthite / Aplite)

Shale

Shale (Sedimentary rock composed of mud/clay minerals)

Dalmatian Stone (often misnamed Dalmatian Jasper)

Aplite (with hornblende/arfvedsonite inclusions)

Quartz Vein in Sandstone

Sandstone with Hydrothermal Quartz (SiO2)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Limonite/Goethite staining)

Sandstone

Arenite (primarily SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Crinoid Fossil in Limestone

Class Crinoidea in Carbonate Matrix (CaCO3)

Chert (White Chert/Flint)

Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)

Sandstone

Arenite (primarily SiO2)

Limestone with Calcite Veins

Sedimentary Calcium Carbonate (CaCO3)

Chert

Chert (microcrystalline quartz, SiO2)

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily SiO2)

Limestone

Calcite (CaCO3)

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)