Mineral And Sedimentary

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Honey Calcite

Calcium Carbonate (CaCO3)

Moqui Marble

Ironstone Concretion (Goethite/Hematite shell with Sandstone core)

Mookaite Jasper

Silicified Radiolarite (SiO2 with impurities)

Mookaite Jasper

Silicified Radiolarite (SiO2)

Gneiss (specifically Micaceous Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Agate Geode

Chalcedony (cryptocrystalline SiO2)

Schist

Mica Schist

Psilomelane (Black Hematite/Manganese Ore)

Barium Manganese Oxide (Formula: BaMn9O18(OH)4)

Travertine

Calcareous Tufa (CaCO3)

Sandstone

Arenite (primarily Quartz, SiO2)

Sandstone (Weathered)

Arenite (primarily SiO2)

Quartz

Silicon Dioxide (SiO2)

Dalmatian Stone

Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)

Magnetite

Magnetite (Iron(II,III) oxide, Fe3O4)

Banded Iron Formation (BIF) / Iron Ore

Banded Iron Formation (composed primarily of Hematite (Fe2O3) and Magnetite (Fe3O4) with Quartz/Chert)

Limonite after Pyrite (Prophecy Stone or Ironstone Concretion)

Goethite/Limonite pseudomorph after Pyrite/Marcasite (FeO(OH)·nH2O)

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Iron Oxide staining)

Sandstone

Arenite (primarily SiO2)

Mica Schist

Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)

Banded Iron Formation (BIF)

Banded Iron Formation

Pyrite in Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Iron Gossan (Limonite/Goethite)

Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones

Halite (Rock Salt)

Halite (Sodium Chloride, NaCl)

Sandstone

Arenite (composed primarily of SiO2, or Silicon Dioxide)

Sandstone with Bedding Planes

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

Banded Sandstone (Wonderstone)

Sandstone with Liesegang Rings (SiO2 with Iron Oxides)

Almandine Garnet

Almandine [Fe3Al2(SiO4)3]

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)

Gneiss

High-grade metamorphic rock (Gneiss)

Carnelian

Carnelian (Silicon Dioxide, SiO2)

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Red Sandstone (Old Red Sandstone)

Ferruginous Sandstone (SiO2 + Fe2O3)

Hag Stone

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

Imperial Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz with Mineral Inclusions

Dalmatian Stone (Dalmatian Jasper)

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Clear Quartz

Silicon dioxide (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

Sandstone (Water-worn Cobble)

Arenite (variable composition, primarily SiO2)

Conglomerate

Conglomerate (SiO2 primary clasts with lithic matrix)

Sandstone (Red)

Arenite (primarily Quartz, SiO2, with Iron Oxide cement)