Sedimentary Rock (Metamorphosed)

Blue Kyanite

Kyanite (Al2SiO5)

Jasper

Silicon Dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Quartz Druse (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Sandstone Pebble with Iron Staining

Clastic Sedimentary Rock (primarily Quartz with Fe2O3 oxides)

Geode with Quartz and Chalcedony

Silicon Dioxide (SiO2)

Chert

Chert (Microcrystalline Silica, SiO2)

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Hag Stone

Porous sedimentary rock (typically Flint, Chert, or Sandstone) with naturally occurring holes

Sandstone (likely Quartzose Sandstone pebble)

Arenite (primarily SiO2)

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

Sandstone (with Iron Staining)

Clastic sedimentary rock (High Silica / Iron Oxide)

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Sandstone

Arenite (primarily SiO2)

Sandstone (Grooved/Weathered)

Arenite (composed primarily of Quartz and Lithic fragments)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Red Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar with Iron Oxide cement)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Sandstone

Arenite (composed primarily of SiO2)

Sandstone with Iron Concretion

Arenite with Limonite/Goethite Concretion

Sandstone (Yellow/Tan Sandstone)

Arenite (primarily Quartz, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Limestone (specifically Fossiliferous or Crinoidal Limestone)

Calcium Carbonate (CaCO3) - Calcite Rock

Fossil Coral

Coral Limestone (a type of biogenic sedimentary rock)

River Cobble (Quartzite-rich Sandstone)

Clastic Sedimentary Rock (Litharenite/Quartzite transition)

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Stromatolite

Biogenic Sedimentary Rock (Lithified microbial mat)

Chert (variations include Flint or Jasper)

Chert (chemical sedimentary rock), Quartz (SiO2)

Sandstone

Clastic Sedimentary Rock (composed mostly of SiO2)

Ironstone (likely Ferruginous Siltstone/Sandstone)

Ferruginous sedimentary rock (FeOx-rich clastic)

Ferruginous Sandstone with Quartz Inclusions

Clastic Sedimentary Rock (Iron-rich Sandstone)

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Fossiliferous Limestone

Calcite (CaCO3) Rich Bio-sedimentary Rock

Hag Stone

Perforated Sedimentary Rock (typically Limestone or Sandstone)

Anthracite Coal

Anthracite (Carbon-rich metamorphic sedimentary rock)

Mookaite Jasper

Siliceous (chert) sedimentary rock, a form of Jasper

Ironstone (Limonitic Shale)

Ferruginous Siltstone / Goethite-rich Sedimentary Rock

Sandstone Concretion

Sandstone (Sedimentary Rock) with silica or calcite cement