Mineral On Sedimentary Rock

Agate

Silicon Dioxide (SiO2)

Quartz Geode / Druzy Quartz

Silicon Dioxide (SiO2)

Dyed Blue Agate

Silicon Dioxide (SiO2)

Gneiss (Banded Gneiss)

Gneiss

Sandstone (Quartz-rich)

Arenite (SiO2 based clastic rock)

Turquoise

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

Sandstone (Ferruginous)

Arenite (with Iron Oxides)

Bauxite

Bauxite (Al(OH)3 mixed with Fe2O3 and clay minerals)

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 cement)

Sandstone (Ferruginous)

Arenite (Fe-bearing Clastic Sedimentary Rock)

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Red Sandstone

Arenite (Fe2O3 rich)

Quartz Pebble

Silicon Dioxide (SiO2)

Clear Quartz Sphere

Quartz (Silicon Dioxide, SiO2)

Picture Jasper

Silicified sedimentary or volcanic rock (primarily SiO2)

Sandstone (likely Arkose or Quartz Sandstone)

Arenite (SiO2 principal component)

Sandstone (Weathered Coastal Boulder)

Arenite (composed primarily of SiO2)

Quartz Geode

Silicon Dioxide (SiO2)

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Limonite (Iron Stone)

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

Red Sandstone

Clastic Terrigenous Sedimentary Rock (composed mostly of SiO2 with Fe2O3)

Ironstone Concretion (Moqui Marble variety)

Ferruginous Sandstone Concretion

African Turquoise

African Turquoise (a trade name for Jasper, a variety of Chalcedony: SiO2)

Gneiss (Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Quartz Geode

Silicon Dioxide (SiO2)

River Cobble (likely Sandstone or Siltstone type)

Sandstone or Siltstone (common rock types that form river cobbles)

Almandine Garnet in Schist

Almandine, Fe3Al2(SiO4)3

Limonite (Iron Ore)

Limonite (an amorphous mixture of hydrated iron oxides, primarily FeO(OH)·nH2O)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Sandstone (Quartzite-rich Pebble)

Arenite (composed primarily of SiO2)

Muscovite Mica

Muscovite (KAl₂(AlSi₃O₁₀)(F,OH)₂))

Sandstone Concretion

Arenaceous concretion (primarily SiO2 with Fe2O3 staining)

Ironstone Concretion / Limonite-stained Siltstone

Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Ferruginous Sandstone

Sandstone (arenite) with Limonite/Goethite cement

Sandstone

Arenite (primarily Quartz, SiO2)

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Banded Gneiss with Quartz Vein

Foliated Metamorphic Rock (Gneiss)

Garnet Schist or Garnet-bearing Quartzite

Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Druze on Matrix

Silicon Dioxide (SiO2)