Anthropogenic Sedimentary (Man Made)

Mixed collection of minerals and rocks (Jasper, Carnelian, Granite, and Quartz)

Silicon Dioxide (SiO2) with varying impurities for silicates and igneous aggregates

Sandy Ironstone

Ferruginous Sandstone

Carnelian and White Quartz Bracelet

Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Quartz

Silicon dioxide (SiO2)

Manganese Oxide Crust on Limestone

Manganese Oxides (e.g., Pyrolusite MnO2 or Romanechite) on CaCO3

Dendritic Agate or Tree Agate

Silicon Dioxide (SiO2) with impurities of manganese or iron oxide

Jasper

Silicon dioxide (SiO2)

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Banded Iron Formation (BIF) / Iron Ore

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

Chert (varietal: Flint or River Pebble)

Silicon Dioxide (SiO₂)

Conglomerate

Clastic Conglomerate (Lithic-rich)

Ironstone with Pyrite

Ferruginous Sandstone (Fe2O3) with minor Sulfide minerals (FeS2)

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Ironstone Concretion (Limonite/Goethite)

Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)

Fossiliferous Brachiopod in Shale

Brachiopoda (Phylum) preserved in Carbonaceous Shale

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Dalmatian Stone

Peralkaline rhyolite with arfvedsonite (formerly incorrectly called Dalmatian Jasper)

Dalmation Stone (Dalmation Jasper)

Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)

Kambaba Jasper (Crocodile Jasper)

Rhyolite containing Fossilized Cyanobacteria (Stromatolite)

Chert (specifically Jasper or Flint type)

Microcrystalline Quartz (SiO2)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

Limestone

Calcium Carbonate (CaCO3)

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)

Shale with Plant Fossils / Carbonaceous Shale

Laminated Mudrock (Siliciclastic)

Limestone

CaCO3 (principally composed of Calcite)

Shale

Mudstone/Shale

Sandstone with Bedding Planes

Arenite (Sedimentary rock composed primarily of sand-sized minerals)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Chert (Flint) Nodule

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Banded Chert

Cryptocrystalline Quartz (SiO2)

Crazy Lace Agate

Silicon Dioxide (SiO2) with iron and aluminum inclusions

Orange Calcite

Calcium Carbonate (CaCO3)

Druzy Quartz (part of a Geode)

Silicon Dioxide (SiO2)

Banded Iron Formation (BIF)

Banded Iron Formation (predominantly Hematite, Magnetite, and Chert/Quartz)

Limestone

Calcium Carbonate (CaCO3)

Red Sandstone

Arenite (primarily Quartz with Iron Oxide coating)