Man Made Rock (Sedimentary Analogue)

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Dalmatian Stone (Dalmatian Jasper)

Dalmatian Stone (A variety of Perthite / Aplite)

Dalmatian Stone (often misnamed Dalmatian Jasper)

Aplite (with hornblende/arfvedsonite inclusions)

Biotite Schist

Metamorphic Rock (Schist)

Sedimentary Sandstone with Iron Oxide

Ferruginous Sandstone

Sandstone

Arenite (predominantly SiO2)

Flint in Limestone (Chert Nodule)

Sedimentary rock containing microcrystalline quartz (SiO2) within a carbonate matrix

Chalk (Calcitic)

Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock

Conglomerate

Conglomerate rock

Conglomerate

Conglomerate rock

Conglomerate

Conglomerate rock

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartz Vein in Matrix (Breccia / Host Rock with Quartz)

Silicon Dioxide (SiO2) in Host Rock Matrix

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 predominant)

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Fossiliferous Limestone containing a Brachiopod or Mollusk Impression

Biogenic Sedimentary Rock / Fossiliferous Limestone

Sandstone (Pebble)

Sandstone (SiO2 dominated clastic sedimentary rock)

Chert / Chalcedony Pebble

Cryptocrystalline Quartz (SiO2)

Chert (or Flint)

Microcrystalline Quartz (SiO2)

Conglomerate

Conglomerate (SiO2 matrix with various lithic clasts)

Chert (Nodule)

Chert (Silica, SiO2)

Chert (Chert / Flint)

Silicon dioxide (SiO2) - Microcrystalline quartz

Pyrite in Shale

Iron Sulfide (FeS2) in Argillaceous Shale

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Gray Chalcedony)

Microcrystalline Quartz (SiO2)

Chert (also known as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Vein in Sandstone

Sandstone with Hydrothermal Quartz (SiO2)

Sandstone (Banded)

Clastic Sedimentary Rock (primarily SiO2)

Quartz

Silicon Dioxide (SiO2)

Banded Sandstone

Clastic Sedimentary Rock (Quartz Arenite)

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone Geode (Unbroken)

Siliciclastic sedimentary rock (primarily Quartz)

Sandstone (with potential trace fossils)

Clastic sedimentary rock (primarily SiO2)

Rounded river or beach pebble

Likely quartz-rich sandstone or quartzite; exact identification requires a close-grained view and hardness test

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Agate in Matrix

Silicon Dioxide (SiO2) within host rock

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 principal component)

Sandstone

Arenite (SiO2 principal component)

Chalcedony in Limestone Host Rock

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Asphalt (Bituminous Slate/Sandstone)

Asphaltum / Bituminous Rock

Quartz

Silicon Dioxide (SiO2)