Sedimentary And Metamorphic Minerals

Ironstone Concretion (Moqui Marble)

Iron Oxide Concretion (Fe2O3 / FeO(OH) mixed with SiO2)

Ironstone (Limonitic Concretion)

Limonite (FeO(OH)·nH2O) with Goethite and Hematite inclusions

Brown Jasper

Silicon Dioxide (SiO2)

Yellow Ochre / Limonite

Limonite (FeO(OH)·nH2O)

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Turquoise (likely Stabilized or Dyed Howlite/Magnesite)

Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Quartz Geode

Crystalline Silicon Dioxide (SiO2) in a Geodic structure

Moonstone

Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.

Coprolite

Fossilized feces (various taxa)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Fossiliferous Shale (with Vertebrate Bones)

Laminated Mudstone containing Fossilized Bone (Apatite)

Rhodochrosite

Manganese Carbonate (MnCO3)

Fossil Coral

Fossilized Scleractinia or Tabulata (various genera/species)

Chert / River Pebble

Silicon Dioxide (SiO2)

Marble

Recrystallized Calcite (CaCO3)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Quartz Geode

Silicon Dioxide (SiO2)

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Grey Jasper (Tumbled Quartz variant)

Jasper (Silicon Dioxide, SiO2)

Limonite (Iron Ore)

Goethite and related iron hydroxides (FeO(OH)·nH2O)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Yellow Calcite

Calcium Carbonate (CaCO3)

Limonite (with Pyrite)

Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O

Garnet in Schist (Polished Tower)

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

Petrified Wood

Silicified Wood (primarily Chalcedony or Quartz, SiO2)

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Turquoise

Hydrated phosphate of copper and aluminum; CuAl6(PO4)4(OH)8·4H2O

Rhodochrosite

Manganese Carbonate (MnCO3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Schist

Mica Schist

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

Pumice or Tufa/Travertine

Pumice (if igneous) or Calcareous Tufa (if sedimentary)

Jasper

Silicon Dioxide (SiO2)

Conglomerate

Conglomerate (SiO2 primary clasts with lithic matrix)

Red Jasper

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium