Sedimentary And Metamorphic Minerals

Limonite

Hydrous Iron Oxide (often Goethite FeO(OH), Lepidocrocite γ-FeO(OH), and other amorphous iron oxyhydroxides)

Chert (Flint)

Chert (Microcrystalline or cryptocrystalline Quartz, SiO2)

Green Aventurine

Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Sandstone

Arenite (SiO2 based)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Jasper (Red and Yellow)

Silicon Dioxide (SiO2) with iron oxide impurities

Sandstone

Arenite (composed primarily of SiO2)

Chert (Jasper-like Silicate)

Microcrystalline quartz (SiO2)

Chert (and/or Flint)

Microcrystalline Quartz (SiO2)

Chert (Nodule)

Silicon Dioxide (SiO2)

Chert (specifically Flint or Common Chert)

Chert (Cryptocrystalline Silica, SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Field Stone/Jasper variety)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

Limonite (Iron-rich Siltstone / Sandstone base)

Hydrous ferric oxide mixture (FeO(OH)·nH2O)

Ferruginous Sandstone

Arenite with Iron-oxide cement (composed of Quartz and Limonite/Hematite)

Chert (specifically Flint or Gray Chert)

Silicon Dioxide (Microcrystalline Quartz), SiO2

Chert (and Flint variant)

Chert (SiO2)

Bauxite

Bauxite (Al2O3·2H2O)

Chert (specifically Flint)

Microcrystalline Quartz (SiO2)

Dalmation Stone

Peralkaline Rock (mixed silicate minerals)

Quartzite

Quartzite (primarily SiO2)

Green Aventurine

Aventurine (a variety of Quartz, SiO2)

Muscovite Mica

Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2

Turquoise

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

Turquoise

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

Turquoise

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

Pink Halite (Himalayan Salt)

Halite (Sodium Chloride, NaCl)

Pink Chalcedony

Silicon Dioxide (SiO2)

Quartz Pebble (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Orange Calcite

Calcite (Calcium Carbonate, CaCO3)

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)

Phylum Echinodermata, Class Echinoidea

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Quartz Geode

Silicon Dioxide (SiO2)

Ferruginous Sandstone (Gritstone)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))

Sandstone (likely Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Oolitic Chert

Oolitic Microcrystalline Quartz (SiO2)

Chert (Nodule)

Chert (composed of Microcrystalline Silica/SiO2)

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Septarian Nodule (Dragon Stone)

Septarian Nodule (Calcium Carbonate/Aragonite/Calcite Concretion)