Mineral Side Rock

Amygdaloidal Basalt

Amygdaloidal Basalt with Secondary Infilling (e.g., Agate, Quartz, or Zeolite)

Sandstone

Arenite (SiO2 primarily)

Sandstone (Quartz-rich)

Arenite (composed mainly of SiO2)

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

Glauconitic Sandstone (Greensand)

Glauconitic Quartz Arenite (containing Glauconite, (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Sandstone (Ferruginous)

Arenite (complex silicate composition with iron oxides)

Sandstone (Ferruginous)

Ferruginous Sandstone (SiO2 with Fe2O3)

Sandstone

Arenite (primarily SiO2)

Sandstone (specifically Picture Sandstone or Wonderstone)

Arenite (composed primarily of SiO2)

Gneiss

Gneiss (a rock type, not a specific mineral with a formula)

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone (Yellow/Siltstone variant)

Arenite (SiO2 primarily)

Sandstone

Arenite

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Red Sandstone

Arenite (Ferruginous Sandstone)

Red Sandstone

Arenite (Ferruginous Sandstone)

Sandstone

Arenite (composed primarily of SiO2)

Variscite (or potentially a turquoise/variscite matrix cabochon, or an impression jasper)

AlPO4·2H2O (Variscite) or related phosphate/silicate material depending on exact composition

Quartz in Limonite-rich Matrix

Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O

Sandstone

Arenite (composed primarily of SiO2)

Sandstone

Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)

Quartz Geode

Crystalline Quartz (SiO2) within a sedimentary or volcanic host

River Cobble (Sandstone)

Arenite (primarily SiO2)

Turquoise in Matrix

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

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite, Calcite, Sodalite, and Pyrite)

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Limonite Concretion

Limonite (Hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)

Quartz Pebbles

Silicon Dioxide (SiO2)

Serpentinite

Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)

Biotite (Black Mica)

Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)

Banded Sandstone

Arenite with Liesegang banding

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide staining (Fe2O3)

Sandstone with Desert Varnish

Arenite (SiO2 predominantly) with Ferromanganese coating

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Diorite

Diorite

Granite

Granite